Difference Between Static and Current Electricity

Most of us just enjoy the benefits of electricity but don't really understand the exact meaning and science behind it, and the phenomena associated with it. For now, let us understand the static electricity and current electricity. Technically the electricity is actually a phenomenon in itself, which involves the displacement or movement of electrons. In a short way status, electricity means electricity is at rest. While the current electricity is a phenomenon of moving electrons in a particular path, direction such as steam of them flowing through conducting materials.  The most common source of current electricity comes from batteries.


Definition of static electricity:

The word static means not in moving condition. It refers to the electricity where the charge build-up on the surface of materials or substance. And they stay static until they are discharged. The static electricity generates by rubbing the two static objects. It is usually uncontrolled and happens sporadically.

Definition of current electricity:

The current electricity which is produced because of the movement of electrons is known as the current electricity. It develops only on the material which has free electrons. The current electricity use for performing mechanical works like for moving the fan, running the machine, etc. 

The main key difference between static and current electricity are listed below:

  • The electricity in which charges remain static is known as the static type of electricity. While the current electricity is developed because of the flow of charges and by measure analog or digital meter.
  • The static electricity develops on the surface of both insulator and conductor whereas the current electricity induces only in the conductor.
  • The magnetic field develops because of the current electricity. And also it doesn't associate in the static electricity.
  • The gold leaf electroscope measures the magnitude of static electricity whereas the current electricity measures by the digital and analog meter.
  • The static electricity exits for a short time whereas the current electricity for long periods.
  • The measuring device of static electricity is a gold leaf electroscope, while the current electricity the measuring device is analog or digital meter.
  • The static electricity develops because of the movement of negative charges from one object to another object. The current electricity is because of the movement of electrons in the atoms of the conductors.
  • A static electric city is usually uncontrolled and just happens sporadically. Current electricity is normally controlled. It is the more used phenomenon of all over the electricity, in countless applications.
  • Static electricity used in lightning strokes, it develops by rubbing the balloons on hair, etc while the current electricity is used for running industrial; and home applications like fan, light, TV, etc.

Difference Between Valence Band and Conduction Band

The valence band and conduction band both are two different energy levels separated by a certain amount of energy. The main key difference between valance band and conduction band is that the valance band specifies the energy level of electrons present in the valence bandshell of an atomic structure while the conduction band holds those electrons that are responsible for conduction.


Definition of the valence band:

It is basically defined as the energy band that comprises of valence electrons present in the outermost shell of an atomic structure. These valence electrons, when provided with sufficient energy, get changed into free electrons and move to conduction band thereby causing conductivity.


Definition of condition band:

The conduction band is the band of electrons orbital that electrons can bounce up into from the valance band when energized. At the point when the electrons are in these orbital, they have enough energy to move freely in the material. This movement of electrons makes an electric current flow. The valance band is the furthest electron orbital of a particle of a particular material that electron involves.

The main key difference between the valence band and conduction band are listed below:


  • The valence band is present below the fermi energy level. While the conduction band is present or their in above the Fermi level in the energy band diagram.
  • The density of electrons is comparatively higher in valance than in the conduction band.
  • When external excitation is provided then electrons present in the valence band moves out of it. However, because of external energy, the electrons move into the conduction band.
  • The valance band is a lower energy state whereas the conduction band is comparatively at a higher energy level.
  • Valance band the energy band formed by a series of energy levels containing valence electrons while the conduction band is higher energy level band.
  • The valance band always filled with electrons while the conduction band partially filled by the electrons.
  • The highest energy level which can be occupied by an electron in the valence band at 0K is called the Fermi level, while in conduction band current flow due to such electrons.
  • The electrons in the valence band experience strong force by the nucleus. As against the nucleus exhibits very weak or almost negligible force on the electrons at the conduction band.
  • While using the valence band, no flow of current due to electron present but the conduction band free electron is able to move anywhere the volume of the solid.
  • At room temperature, the valence band is usually either partially or completely filled, whereas the conduction band is generally empty or partially filled at room temperature.
Explore more information:
  1. Difference between n type and p-type semiconductor
  2. Difference between conduction and induction
  3. Difference between conductor and semiconductor
  4. Difference between an extrinsic and intrinsic semiconductor
  5. Difference between PN junction diode and Schottky diode
  6. Difference between static and current electricity

Limitation of MCB

Some limitations of MCB are listed below:

  • The cost of MCB is greater than a fuse.
  • The risk of overloading of the circuit due to an unqualified person operating than is completely removed.
  • The cost of the MCB distribution board is greater than the rewireable fuse board is used.

Difference between absorption and adsorption | Absorption vs Adsorption

The major key difference between adsorption and absorption is that one is a surface process and the other a bulk process. Absorption is one substance that enters the bulk or some volume of the another substance e.g. gas absorbed by a liquid. While the adsorption takes place on the surface of a substrate. Here this article gives information about the difference between absorption and adsorption are listed below.

Definition of absorption:

Adsorption is a surface, the accumulation of a gas or liquid or a solid. Absorption can be refined further based on the strength of the interaction between the adsorbent and the adsorbed molecules. 


Definition of adsorption:

Adsorption is a surface process, the accumulation of a gas or liquid or solid. Adsorption can be refined further based on the strength of the interaction between the adsorbent and the adsorbed molecules.

The main key difference between absorption and adsorption are listed below:


  • Absorption is a bulk phenomenon, adsorption is a surface phenomenon.
  • Absorption is mostly an endothermic process while adsorption is a mostly exothermic process.
  • Absorption is not affected by temperature, while the adsorption is favored by low temperatures.
  • Absorption is an assimilation of using a molecular species throughout the bulk of the solid or some liquid is termed as absorption, while the Accumulation of the molecular species at the surface rather than in the bulk of the solid or liquid is termed as adsorption.
  • Absorption occurs at a uniform rate, Adsorption is steady increases and reaches equilibrium.
  • Absorption is the same throughout the material while adsorption is the concentration on the surface of adsorbent is different from that in the bulk.
  • Absorption is material get absorbed into other material throughout the availability of space and also due to the properties of each material while the adsorption is the adsorbates bind onto the surface of the adsorbent most commonly through van der walls interaction or through covalent bonds.
  • During the process of absorption, the concentration of absorbed substances does not show any significant change. It remains to show significant change. IT remains constant throughout the medium while during the process of adsorption the concentration of the adsorbed substance changes from bulk to the bottom of the adsorbent.
  • Absorption can be categorized into two types; physical and chemical absorption while the adsorption can be categorized into two types; Chemisorption and physisorption.
  • The concept of absorption is applied for in cold storage, ice production, turbine inlet cooling, and refrigerant absorption, chiller for space cooling applications. It is also used in the hydrogenation of oils and carbonation of beverages. The concept of adsorption is applied in air conditioning, chiller, water purification, chillers, synthetic resin and in the development of non-stick coating and in various biomedical devices.
  • The rate of absorption maintains a steady-state throughout the process. The stated state marinated despite increases or decreases in the temperature while the rate of adsorption is usually high in the initial stages of the process, after a few minutes, it begins to decreases until equilibrium is reached. Increases in temperature increase the rate of adsorption decreases.
  • Absorption is comparatively slow than adsorption and the equilibrium take place slowly. While Adsorption is a rapid process. The equilibrium takes place quickly. 


Adsorption Examples:

  1. Nickel, platinum, and palladium is these adsorbent are widely used an as a catalyst in many organic processes such as hydrogenation of oils.
  2. Activated charcoal is used as an adsorbent with a wide range of applications. For example, it is used in the purification of gases and water or as an air filter in gas masks.

Absorption Examples:

  1. Absorption of water by a sponge.
  2. Absorption of oxygen from air by water.
  3. Absorption of ammonia by water.
  4. Removal of hydrogen sulfide biogas. In this process, hydrogen sulfide is first absorbed into water and after that treated with iron oxide.

Difference Between Conduction and Induction

The major difference between conduction and induction is that conduction allows the charging of a natural body with a charged body by forming a direct contact with it. But induction is the process of charging a neutral body by a charged body without making any direct contact with them. Here this article gives the difference between conduction and induction are listed below:


Definition of Conduction:

Conduction is the process by which heat energy is transmitted through collisions between their neighboring molecules. 

Definition of Induction:

Induction is the process where electrical power is transferred from one object to another without the contact object or touching.

The main key difference between conduction and induction are listed below:


  • Conduction is the process of transferring charges from a charged body to a neutral body. while the induction is the process of inducing the charge on a natural body by the use of a charged body.
  • In the case of conduction, the current flowing through both bodies have the same direction while in case of equal current flows through both the bodies but in a different direction.
  • In conduction result flow of current due to electric field while the induction results in an inflow of current due to change in a magnetic field.
  • Charging a body by the condition is done by touching a charged body whereas the induction touching is needed to charge a body by induction.
  • A potential difference must exist between two bodies for conduction to take place thus required a gradient path. As no direct contact is maintained at the time of induction thus the gradient path may or may not be needed.
  • Some charge is lost in changing conduction whereas there is no loss in any charge in charging by induction.
  • Conduction needs direct physical contact between the two bodies. However, no physical contact us needed in case of induction but the two bodies must be placed close to each other.
  • As the charge gets transferred in case pf conduction thus there is a reduction in the amount of overall charge present in a charged body remains the same even after inducing, charges of opposite polarity in the other body.
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Characteristic of fuse

As we know that a fuse is to carry the normal current without overheating but when the current exceeds its normal value, it rapidly heats up to a melting point and disconnects the circuits protected by it. In order that it may perform this function satisfactorily. The fuse element should have the following characteristic.

Characteristics of fuse element:

  • It is a low melting point.
  • High conductivity for silver and copper.
  • Free from deterioration due to oxidation.
  • Low cost for lead, tin, and copper.
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Characteristics of RCCB

The characteristics of RCCB mainly include the following:

  • Phase and neutral both are connected through RCCB.
  • Whenever there is any ground fault occurs, then it trips the circuit.
  • The amount of current supplied through the line should go back through natural.
  • If a home has an earth system connected to an earth rod and not the main incoming cable then it must have all circuits protected by an RCCB mite not be able to get enough fault current to trip an MCB device.
  • RCCB is a very good and effective type of shock protection.
  • It detects by RCCB any mismatch two currents flowing through both phase and neutral detect by RCCB and trip the circuit within 30 milliseconds. 
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Difference between speed and velocity | Speed vs velocity

As we know, speed and velocity are the two most common key terms in the field of physical science and engineering. Most of the times these terms confuse the newbie or those who just started learning the physics sciences and engineering.


Definition of speed:


The distance covered by a body in a given interval of time is called speed.  It is a scalar quantity as we need only its magnitude, but not the direction to specify it. It can be understood as the rate at which a body travels a distance, in the unit time. It determines the quickness of the object. i.e how fast an object is going. The meter per second is the SI unit of speed. The most commonly used unit of speed in kilometers per hour.

Definition of velocity:

The displacement of something in a definite time is called velocity. It is a vector measurement, as contains both the components i.e magnitude and direction. Therefore while the velocity of the object one must keep in mind that the direction should be special mentions, with a view to explain velocity completely.

The main key difference between speed and velocity are listed below:

  • Speed is the rate at which an object covers a certain distance while the velocity can be defined as the rate at which an object changes position in a certain direction. 
  • Speed is a scalar quantity while the velocity is the vector quantity.
  • The average speed will continue to count even if the object if direction while the velocity of the object is direction, therefore the object must follow one direction.
  • Speed is non-directional, while the velocity has direction.
  • Speed can never be negative or zero, velocity magnitude can be zero, negative or positive.
  • Speed may or may not be equal to the velocity, While in velocity An object may possess different velocities but the same speed. 
  • Both speed and velocity SI unit of m/s.
  • Speed never decreases with time. For moving objects. It is never zero. But the velocity can decrease with time. For a moving object. It can be 0.
  • V = d/t where the v is the average speed, t is the time taken to travel the distance and d is the distance traveled while the velocity is V = Δx/Δt, where is the average velocity Δt is the time of arrival and Δx is the displacement.
  • Speed determines how fast something is moving? while the velocity determines what direction something is moving?
  • A sports bike traveling at 50 m/s would go from 0 m/s to 30 m/s. before reaching 50 m/s and could even reach around 70 m/s. However, the average speed will be the speed of the bike while in velocity example is that a train going towards the south with an average speed of 50 km/h will have a velocity of 50 km/h, north. An object going straight in a particular direction is considered to have a velocity. 
Similarities between speed and velocity:
  • Measures how fast an object is traveling.
  • SI unit meter/second

Effect of gravity of mass and weight

How gravity affect mass and weight?


  • Mass is a measure of the amount of matter that an object has or how much stuff it is made up of. While the weight is a measure of how much gravity pulls on a mass or object
  • The weight of the .object depends on gravity at that place while mass is always a constant at any place and any time.
  • On the moon, there is less gravity pulling on the object so their weight is less. 
  • For example, a rock that weighs one pound while the earth will weigh less than that if it is taken to the moon.
  • But does its mass change just because it is on the moon? No, it is still the same size and looks the same. It just has less gravity pulling on it, so it weighs is less.
  • That is why an object that seems heavy to use on earth ends up being light enough to float around if they are taken into space.
  • Something similar happens is very high places like tall mountain peaks.
  • There is less gravitational pull in high places, so you would weigh a tiny bit less on the top of Mt. Everest.
  • This is because the peak of the mountain is higher and further away from the center of the earth, so the pull of gravity is that spot is weaker than at the bottom of the mountain.
  • Even if they weigh less because of a change in gravity force on your body, your body' s mass of still the same.
  • As your body grows you will have more mass which also means you will weight more. That's because when you are on the earth, the amount of gravity that pulls on you stays the same.
  • So when your mass changes, so do your wright.

Difference between force and power | Force vs Power

Force and power both quantities that come in the study for mechanics. In everyday usage the two terms may have similar connotations, however, in physics, the two terms have two separate meanings. The main key difference between force and power is that the term force is used to describe something that can change the momentum of an object. while the power is referred to as the rate as which force is able to transfer the energy. Here this article gives information about the difference between force and power to better understand this topic.


Definition of force: 

  • Force is a push or pull
  • Require an agent 
  • Acts an object
  • Measuring unit is Newtons
  • Is a vector 
  • Is a contact force or long-range force

Definition of power:

  • Power is the rate at which how work is done.
  • Another way energy is transmitted.
  • Power of a moving object.
  • The measuring unit is Joule/second or Watt.
  • It is a scalar.
  • It connects to object and really looking at how fast work is happening

The main key difference between force and power are listed below:

  • A force or a pull resulting from an interaction between objects while the power is the rate at which work is done or energy is transmitted.
  • The measuring unit of force is newton while the unit of power is joule/second.
  • The symbolic representation of force is F while the symbolic representation of power is P.
  • Force is given by a cross product of mass and acceleration, power is given as the ratio of work done per unit time. Means Force = mass multiplied by acceleration, F = ma, Power  = work divided by time, P = w/t.
  • Force is applied over a distance creates work, Power is a rate at which work is performed.
  • The force word or the unit of name force is given by the name of Isaac Newton while the Power words name comes after scientist James Watt.
  • Force is a vector quantity thus both magnitude and direction are required to have the resultant force on an object while the power is a scalar quantity thus is specified by only its magnitude.
  • Force example gravity, friction, magnetism while the power is horsepower (1 horsepower = 750 Watts).
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Difference Between Mass and Weight

The main difference between mass and weight is mass is an amount of matter in material while the weight measures the force of gravity act upon the mass. The term mass and weight are used interchangeably in ordinary conversion, but the two words don't mean the same thing. First, let us understand definition of mass and weight.

Definition of Mass:

Mass is a the quantity of matter in a body regardless of its volume or of any forces acting on it. The mass is essential for how much stuff is in an object. The unit for mass is gram, kilogram or milligram. 


Definition of weight:

The weight is a measurement of the gravitational force acting on a an object. If you are considering an object interacting with the earth this force is called the weight. The unit for weight is the newton.

The main key difference between mass and weight are listed below:


  • The SI unit of mass is the gram or kilogram,  the SI unit of weight is Newton.
  • Mass is a scalar quantity as it has nothing to do with direction while the weight is a vector quantity as there is a force that acts down toward the earth.
  • Mass is denoted by M while the Weight is denoted by W.
  • Mass body shows that overall of matter from which it is composed while the weight of a body is force editing between a body with varying mass and gravity.
  • Mass is considered a fundamental quantity that is of independent nature while the weight is known as a derived quantity.
  • A body is independent of a cation where the body is present while the weight of a body shows the variation with the location.
  • A body is always composed of matter thus mass can never be zero but as the weight of a body is a product of mass and gravity thus it can be 0 in the absence of gravity.
  • Mass is always constant at any place and any time and anywhere while the weight of an object depends on the gravity at that place.
  • Mass of a moving body M = F/A, Weight of  a body W = mg
  • Mass is measured using a pan balance, a triple beam balance, lever balance or electronic balance while the weight is measured using the spring balance.
  • The mass of the body is independent of external factors while the weight of the body varies according to a changed in external conditions.
  • Mass of an object is measured using the ordinary balance as it is determined by making a comparison between quantity and the unknown one. While spring balance generally measures the weight of the object.
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Difference Between Magnetic Field and Magnetic Flux

The main comparison between the magnetic field and magnetic flux is that the magnetic field is the region around the magnet where the moving charge experiences a force whereas the magnetic flux shows the quantity or strength of magnetic lines produced by the use of a magnet. In this article give the other key difference between the magnetic field and magnetic flux is listed below.

Definition of the magnetic field:

The magnetic field is designed as the region around the magnet where its poles and electric charges experience the force of attraction or repulsion. The presence of the field is determined through the needle. In actual practice, the magnetic field has no real existence and they are purely imaginary.

Definition of Magnetic flux:

The magnetic flux is defined as the total number of magnetic lines of force produces by the magnet. It is measured in weber. The on weber is equal to the 10^8 line of force or the Maxwell. Maxwell is the CGS unit of magnetic flux. The magnetic flux is totally similar to the electric current.

The main key difference between a magnetic field and magnetic flux are listed below:


  • The SI unit of the magnetic field is Tesla while the SI unit of magnetic flux is Weber.
  • The magnetic field is expressed as the product of the magnetic strength and the direction of the moving charges. Whereas the magnetic field is the product of strength and the area around the poles.
  • Magnetic defines as the symbol of F while the magnetic flux defined as the Ⲫ. 
  • The magnetic field is equal to the F = qvB while the magnetic flux is equal to the Ⲫ = BA
  • The area around the magnetic field where the pole and the moving charge experience the force of attraction and repulsion is called the magnetic field while the magnetic flux shows the quantities of the magnetic line of force passes through it.
  • The magnetic field only depends on the magnet which generates it whereas the magnetic flux depends on the magnetic strength and area.

Difference Between Amps and Watts

As we know, amps and watts are the two most common key terms in the field of electrical and electronics and communication engineering. Most of the times these terms confuse the newbie or those who just started learning the electronics sciences.
Definition of Amp:

The ampere is a rate of flow electric charge flow through the conductor. The SI unit of electric current. It represented by the symbol of A. 

Definition of Watts:

A watt has expressed the rate of the power flow. When one amp flows through an electrical difference of one volt, its result in terms of watts. W is the symbol for watt or watts.

One of the major differences between the amp and watt is that the amp is the SI unit of the current wheres the power is the  SI unit of the power. Here this article gives the difference between volt and amp to better understand this topic.


The main key difference between amps and watts are listed below:
  • Amps are the unit of current flow, while in watts is the unit for power.
  • Amps when multiplies by voltage equate to watts.
  • Amps are applicable only to electricity while watts is can be used in other forms of energy.
  • Measuring amps is much easier than measuring watts.
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Wattmeter | Definition | Symbol | Formula | Types | Uses

Definition of  Wattmeter:


The wattmeter is an electric instrument that is used to measure the electric power of various electric circuits. It consists of the current coil and voltage coil. These instruments are widely used for transmission and distribution of electric power and these are also used for protection purposes.


Wattmeter Symbol:

Wattmeter Symbol


Wattmeter Formula:


The wattmeter measure power of the various electric circuit. It works on a using power formula.

P = IV COSΘ

The exact wattmeter reading formulas are given below:

  • Wattmeter reading in single-phase = Power load (VICOSφ) + Power in the current coil ((I2r)
  • Wattmeter reading in single-phase  = VICOSφ + I2r
  • Three-phase wattmeter reading = √3 (VIcosφ + I2r)

Type of  Wattmeter:


There are two types of Wattmeter given below:
  • Dynamometer Type Wattmeter
  • Induction type Wattmeter

1. Dynamo type Wattmeter working principle:

Dynamo type wattmeter is a moving coil instrument and their operating field is produced in by other fixed coil. These instruments consist of a fixed coil having two equal sections which are parallel to each other. These two fixed coils are forced to avoid hysteresis losses. When an alternating current passes through the fixed coil, it produces a magnetic field and moving coil starts moving and the pointer is attached to the moving coil with a spring and it starts moving when moving coils move.

Advantages of Dynamometer type wattmeter:
  • These instruments provide full accuracy on direct current.
  • These instruments are made to give very high accuracy when these are used 

2. Induction type Wattmeter working principle:
These instruments are used on both of AC as well as DC supplies. These wattmeters provide accurate readings only when the frequency and supply voltage are constant. These wattmeters consist of two laminated electromagnets and one of them is excited by the current with exciting winding. This winding is connected in series of the circuit. The other magnet is excited by the current which is promotional to the current. Its exciting coil is parallel connected in the circuit. The winding of the first magnet carries line current and the other coil carries voltage and is highly inductive. This coil is connected to the supply and the flux is 90 degrees behind the voltage. The torque is produced and is proportional to the power in the load circuit. The torque acts on the disc and the force is produced in the disc. The disc started moving and the pointer is attached on it with a spring and it shows reading on its scale.

Advantages of induction type wattmeter:
  • They are inexpensive as compared to moving iron type instrument. 
  • They rating their accuracy over a wide range of temperatures as well as loads.
  • Long scale, freedom from the effect of start field.
  • They have high torque is to weight ratio as compared to other instruments or devices.
Disadvantages of induction type Wattmeter:
  • Change in temperature cause variation in the resistance of the moving element, affect the eddy current therein and so the operating torque. The error due to this is in part offset by a balancing effect due to a change in temperature of the windings.
  • Change in frequency from that of the calibration value causes variations in both reactance of the voltage coil circuit. Which is highly inductive and also in the amount of compensation from the phase compensating circuit. Within the limit of frequency met within the practice on the main.

Uses of Wattmeter:


The wattmeter is used in various like:
  • Laboratories
  • Industries 
  • Measurements of power in distribution and transmission power.
Explore more information:
  1. Ammeter 
  2. Voltmeter
  3. Colorimeter
  4. Ohmmeter

Difference between Electric and Magnetic Field

The main key difference between the electric magnetic filed is that the electric field is the area around the charged particle, it was introduced by Faraday while the magnetic field is the area or region around the magnetic where the poles of magnetic shows force of attraction or propulsion. The main key difference between electric and magnetic field are listed below.

Definition of the electric field:

The force around the electric charge particle is called an electrical field or electric field intensity. In same way, it is an area around the electric field where the force line exists. It has magnitude and direction. Hence it is a vector quantity. The symbol of E is expressed in the electric field and it is measured in newton/ coulomb.

Definition of a magnetic field:

The region around the magnetic field where its poles exhibit a force of attraction or repulsion is called the magnetic field. The magnetic field also induces when the electric charges are moving in space or an electrical conductor.


The main key difference between electric and magnetic field are listed below:


  • The SI unit of an electric field is the newton per coulomb whereas the SI unit of the magnetic field is Tesla.
  • Direction and magnitude specify the magnetic field. Thus it is a vector quantity. The electric field is also called as the vector field.
  • The electric field intensity is expressed by the symbol of E whereas the magnetic field intensity is expressed by B.
  • The region around the electric charge where the electric force exists that is called an electric field. The area around the magnet where the pole of the magnet exhibits a force of attraction or repulsion is called a magnetic field.
  • The electric field lines do not form a loop whereas the magnetic field lines form the closed-loop.
  • The electric field line induces on a positive charge and extinguishes on a negative charge while the magnetic field line generated from a north pole and terminates to the south pole of the magnet.
  • In an electromagnetic field, the electric field is perpendicular to the magnetic field whereas the magnetic field is perpendicular to an electric field.
  • The electric field intensity is measured by a spectrometer whereas the magnetometer measures the magnetic field intensity.
  • The electric field produces by a unit pole charge either by a positive or through a negative charge while the magnetic field caused by a dipole of the magnet.
  • The electric field induced by a single charge while the magnetic field induced by a north and south pole of the magnet.
  • The electric field is directly proportional to the flux whereas the intensity of the magnetic field depends on the number of field lines produces by the magnet.
  • The formula of the electric field is E = F/q while the magnetic field is B = Fi/ A.
  • An electric field exists two-dimension while the magnetic field exists three-dimension.
  • The electric field line can do work the speed and the direction of the charge changes while the magnetic field cannot do work. The direction of the charge change but the speed of the particles remains constant.
  • In the electric field, the like charges repel each other and the unlike charges attract each other, whereas the magnetic field the like poles repel each other the unlike poles attracts with each other.

Difference Between Wattmeter and Energy Meter

The main comparison between wattmeter and energy meter is that the wattmeter measures the electrical power flows in the circuit in watt while the energy meter measures the total electrical energy consumed by the electrical load. Here this article give information about the key difference between wattmeter and energy meter are listed below.


Definition of wattmeter:

The wattmeter is an instrument for measuring the electric power flow in a given circuit in watt. The internal construction of a wattmeter is such that it consists of using two coils. One of the coils is in series and the other is connected in parallel. The coil that is connected in series with the circuit which is known as the current coil and the one that is connected in parallel with the circuit which is known as the voltage coil.

Definition of energymeter:

The meter is used for measuring the energy utilizes by the electrical load known as the energy meter. The energy is the total power consumed and utilized by the load at a particular interval time. It is also used in domestic and industrial AC circuit for measuring the power consumption. The meter leads expensive and accurate.


The main key difference between wattmeter and energy meter are listed below:

  • The energy meter measures the total energy consumed by the load while the wattmeter measures the power in a circuit.
  • The energy meter measures the energy in joules but wattmeter the measure the power in watts.
  • The energy meter driving, braking, and moving system along with the counting mechanism are the main parts, but the wattmeter pressure and current coil, control system, scale and pointer, damping system to the central part.
  • The energy meter work on the principle of conversion of electrical energy into mechanical energy.  Whereas the wattmeter works on the principle that the force acts on the current-carrying conductor when it is placed in an electromagnetic field.
  • The energy meter is used for measuring the total power consumed by the load in the industries and homes while the wattmeter is used for measuring the power of an electrical circuit. It is also used for determining the power rating of the homes and industrial appliances.

Difference between moving iron and moving coil instruments

One of the major difference between the moving iron and moving coil instrument is that in moving iron is a soft iron system is used for measuring mechanism. While in moving coil instrument the conductor coil is used for DC measurement. Now let us discuss the difference between moving the iron and moving coil instruments to better understand this topic.

Definition of moving iron instrument:

Moving iron is an instrument that uses the soft iron core for measuring the current or voltage is known as the moving iron instrument. It works on the principle that the iron attracts toward the magnet. The magnetic field induces because of the electromagnetic and the iron piece is placed between this field. The force of attraction acting on the soft iron core and the magnitude of the force depends on the strength of the magnetic field.


Definition of moving coil instrument:

The instrument in which the coil rotates between the magnetic field of the permanent magnetic for measuring the DC such type of instrument is known as the moving coil instrument. It works on the principle that the force acting on the coil places between the magnetic field of the permanent magnet. and because of this magnetic field, the coil rotates.

The main key difference between moving the iron and moving coil instruments are listed below:

  • The MI iron instrument has a non-uniform scale whereas the moving coil instrument has a uniform sale.
  • Moving ironwork on the principle of magnetism, Moving coil work on the principle of DC motor.
  • The moving iron instruments use the soft iron piece as a rotating element. While the moving coil instrument uses the coil as a rotating element.
  • In moving iron, the defection of torque proportional to the square of the current while moving coil defection torque is proportional to the current.
  • The moving iron instrument is less accurate as compared to the moving coil instrument.
  • In moving iron the damping is provided by air damping while in moving coil instrument damping is provided by eddy current.
  • The working iron instrument is used for measuring both the direct and alternating current whereas the moving coil is used for the DC measurement.
  • The moving iron instrument consumes more power than the moving coil instrument.
  • Moving iron is gravity controlled instrument while in moving coil is a spring control instrument.
  • The moving iron instrument is free from totally from the hysteresis loss but in the hysteresis loss occurs in the moving coil instrument.
  • The instrument which uses the soft iron piece as a moving element such type of instrument is known as the MI instrument.
  • In moving iron instruments the gravity or spring provides the controlling torque to the instrument while in moving coil instrument the spring provides the controlling torque to the moving coil instrument.
  • The moving iron instrument can be used as an ammeter, voltmeter and wattmeter whereas the moving coil instrument is used as a voltmeter, ammeter, ammeter, and galvanometer.
  • The moving iron instrument uses the air friction damping while the moving coil instrument use for the eddy current damping for the system. The damping is the phenomenon through which the amplitude of the oscillations decreases.
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