Difference Between kW and kWh

The main key difference between the kW and kWh is that the kW measure the power generated and the utilize by the devices whereas the kWh measure the energy consumed by the electrical equipment. Here this article gives information about the difference between kW and kWh to better understand this topic.


Definition of kWh:

  • The kW stands for kilowatt, which measures the power delivered by the electrical device with respect to time or we can say that it calculates the work performed by the electrical appliances regarding time. The home appliances like the fan, the lamp, electrical heater have rated power and this power is measured in kilowatts.

Definition of kWh:

  • The kWh stands for kilowatt-hour which measures the work performed by the appliances at the given period. The kWh measures the energy utilized by the machines. The small consumption of the energy is measured in kilowatt-hour and the large consumption of energy is measured in megawatt-hours.
The main difference between kilowatt and kilowatt-hour is that kW shows a unit of power and kWh is a unit of energy.

  • kW - Power required 
  • kWh - Energy needed to keep the power going

The main key difference between kW and kWh:

  • The kW stands for kilowatt and the kWh stands for kilowatt-hour. The kWh measures the energy which is the product of the total power consumed by the devices and the time in an hour.
  • The kW is the unit of measuring the power utility and consumption by the electrical measures like motor, generator, heater, etc but the kWh measure the energy consumed by the electrical appliances.
  • The kW measures the power consumed by the electrical appliance like a bulb, electric heater, fan, etc while the kWh is mainly used for calculating the energy utilized by the machines.
  • The formula of kilowatts (kW) is joule/second*1000 while in kWh(kill watt-hour) is kW*hour.
  • kW is the amount of power used simultaneously at an any given amount of time while kWh is a unit of 1 kW per hour of time.
How to convert kW to kWh:

kWh can be calculated from kilowatts and the number of hours the appliance has been in operation. With the energy being equal to the power times the period of time, to put it scientifically E(kWh) = P(kW)*t(hours).

Explore more information:
  1. Difference between power and torque
  2. Difference between active and reactive power

Difference Between Charge and Current

As we know, charge and current 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. 

The key difference between the charge and the current is that the charge is the physical property of matter while the current is the rate of flow of charges. Here this article gives the information about the difference between charge and current are listed below


Definition of charge:

The charge is a fundamental property of particles that allow them to interact with each other via electromagnetic forces. During these interactions, the charge is always conserved. Electric charges could be either positive or negative. As we know that a positive charge refers to the charge carried by a proton while negative charge refers to the charge carried by an electron. 

Definition of  current:

Current is measured in the unit of amperes(A). A current of 1 A refers to the flow of charge where 1 C of charges flow past a point every second. 

The main key difference between charge and current are listed below:

  • The charge experiences the force only in the electrical field, wheres the current experience the force both in the electric and magnetic fields.
  • The coulomb is the unit of electric charges while the current in the measured the amperes.
  • The charge is the property of matter because of which the matter experiences the force of attraction or repulsion in an electric field. While the current is the rate of flow of charged particles called electrons.

Difference Between Power and Torque

As we know, Power and Torque 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 Torque:

The torque is the measure of the circular force whose effect can rotate by the particular type of the object. In other words, it is the product of the force and the distance. The torque is also called the twisting power. The SI unit of the torque is newton-meter an equivalent to joule.

Definition of Power:

Power is the measure of the amount of the work done, or in other words, power is defined as the amount of energy utilize a part unit of time. It is measured in joules/seconds and the SI unit is a watt. The power is mainly into two types the electrical power and mechanical power.

One of the major differences between power and torque is that the power is the amount of work done by an object while the torque is the tendency of the force to rotate object in a particular direction. Here this article gives information about the difference between power and torque are listed below.

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

  • The unit of power is a joule per second while the unit of torque is equivalent to the joule.
  • The power is the amount of energy per unit of time whereas the torque is the measure of energy whose effect can rotate the object.
  • The SI unit of power is the watt, whereas the SI unit of the torque is newton-meter.
  • The power is represented by the letter P whereas the torque is represented by the greek alphabet T.
  • The torque is induced when the force is applied to an object or body. While the electrical power is caused by the generator or through the battery and also the mechanical power is developed by doing some work. 
  • The power is defined as a ratio of the energy consumed with respect to time whereas the torque is the product of the force and distance.
  • The power is mainly classified into two types, mechanical power, and electrical power. There is no specific type of torque.
  • The electrical power is measured through the energy meter or multimeter whereas the torque is measured through a torque sensor or torque meter.
  • The power is a scalar quantity whereas the torque is a vector quantity. Torque twisted the object in a direction opposite to which the force applied to it.
Explore more information:

Difference Between Volt and Amp

As we know, Volts and amp 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 Volt:

The volt is measured by the work done by the electric charge to move from one end to another. It is the unit of the potential difference, electric potential, and electromotive force. The volt is represented by the symbol of V. The subunit of volts is microvolt, megavolt, millivolt.

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. 

One of the major differences between the volt and amp is that the volt is the SI unit of the voltage, electromotive force, potential difference whereas the amp is the SI unit of the current. Here this article gives the difference between volt and amp to better understand this topic.

The main key difference between volt and amp are listed below:

  • The volt has measured the force which causes the electrons to flow through the conductor whereas the amp measures the rate of flow electrons.
  • Volt and amps are correlated by ohm's law.
  • The volt represented by the symbol, of V and the ampere is represented by the symbol of A.
  • Power sources are often labeled by how many volts it has but while you can only get the number of amps when you can apply the power source to the circuit.
  • Volt is equal to the ratio of joule/coulomb whereas the amp is represented by the Coulomb/second,
  • The volt is the unit of potential difference, Voltage and electromotive force whereas the amp is the unit of current(I).
  • Most of the batteries have a fixed voltage but their ampere varies with higher amperage batteries lasting longer.
  • The volt is measured by the voltmeter whereas the amp is measured by the ammeter.
Explore more information:

Difference Between Volts and Watts

As we know, Volts 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 Volts:

A volt is describing that the potential difference between two points of a conducting wire carrying a constant current of 1 ampere when the power dissipated between these points is equal to 1 watt. The symbol of a volt is V.

Definition of Watts:

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

One of the major differences between the volts and watts is that the volt is the SI unit of electromotive force and potential difference while in the watts measure the SI unit of power. Here this article gives information about the difference between volts and watts to better understand this topic.

The main key difference between volts and watts are listed below:


  • The SI unit of electromotive force and potential difference, whereas the watt is the SI unit of power.
  • The symbolic representation of volts is V and the watt is represented by the symbol of W.
  • The formula of the volt is potential energy/ charge, Formula of watt is volt*current.
  • In volts, a small amount of power is measured whereas watt measures the real power utilizes by the electrical devices.
  • The reading takings in volt are easier as compared to watts because the main reason that watt requires both the quantities of voltage and current.
  • The value in volts is measured by the voltmeter whereas the watt is measured by the power meter.
  • The reading taking of volts is very easy when compared to watts while the reading taking of watts is difficult since it required quantities of both voltage and current.
  • Volt describes a small portion of voltage from the power source, watts gives a more realistic measurement for power.
  • The base unit of watt us KgM2S-3 and the base unit of a volt are KgM2A-1S-3. The base unit is the fundamental unit that is not combined with any other unit examples- meter, kilogram, ampere, etc.
  • The power supplies and batteries often show how many volts it provides but not how many watts.
  • Volt is derived a portion of the power source while the watts can give you a more realistic measurement.
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Galvanometer vs Voltmeter

Galvanometer and voltmeter are measuring the device which is often used to evaluate the electric circuit. The main comparison between galvanometer and voltmeter is that a galvanometer is a type of device which has parts that move in response to an electric current, while in a voltmeter is a device that is used to measure the potential difference between two points in a circuit.

What is Galvanometer?

As we know, the Galvanometer is a particular type of analogue using induction in a coil to deflect a needle against the resistance of a spring. They were often used as one component in building wider range ammeters and voltmeter.

What is Voltmeter?

A voltmeter is also known as the voltage meter. It is an instrument that measures the voltage or potential difference in voltage known as the voltmeter. As we know, The voltmeter is always connected in parallel with the circuit. Some voltmeter is intended for the direct current called as a DC circuit and other designed for alternating current called the AC circuit.
This the instrument used to measure electric potential difference or EMF between two points in an electric circuit.

Difference between Galvanometer and voltmeter:

  • A galvanometer is an instrument used to detect the flow of current in the circuit, while in voltmeter is in the instrument used to show the amount of potential difference across two points in the circuit.
  • A galvanometer tells the direction of current in the circuit, Voltmeter tells nothing about current in the circuit.
  • A galvanometer connected series in the circuit, voltmeter connected parallel in the circuit.
  • A galvanometer is a moderate resistance, While in ideal voltmeter should have infinite resistance hence the resistance of a voltmeter is very high.
  • The magnetic field is required for a Galvanometer work, Voltmeter can work with or without a magnetic field.
  • A galvanometer measure only direct current, Voltmeter tells nothing about current in the circuit.

Advantages and disadvantages of Galvanometer

A Galvanometer is one type of ammeter. A galvanometer is an instrument for detecting and also a measuring electric current. The Galvanometer is the device that is used for measuring the magnitude of the device or detecting the presence of a small voltage(V) and current(I). The Galvanometer is mainly used in the potentiometer and bridges where they indicate the zero current or called the null deflection. Here this article gives information about the advantages and disadvantages of Galvanometer to better understand this topic.


Advantages and disadvantages of Galvanometer


Advantages of galvanometer:
  • It will not affect by a strong or big magnetic field.
  • It is accurate and reliable.
  • Scales of this is uniform.
Disadvantages of galvanometer:
  • Overload can spoil and kind of galvanometer.
  • We can not change the restoring torque easily.
  • The temperature change will cause a change within restoring torque.
  • These cannot be used for AC quantities measurement.
This article also gives information about moving coil Galvanometer to better understand this topic.

Advantages and disadvantages of a moving coil galvanometer:


Advantages of moving coil galvanometer:
  • High accuracy and reliability
  • The torque to weight ratio is high.
  • High sensitivity.
  • Their scale is uniform.
  • Not easily affected stray magnetic fields.
Disadvantages of moving coil galvanometer:
  • It can be used only to measure direct currents.
  • Develops errors due to factors like aging of the instruments, permanent magnets and damage of spring due to mechanical stress.
  • The change in temperature causes a change in restoring torque.
  • Restoring torque can not be easily changed.
  • Such an instrument can be used only measurement direct current quantity and can not be used for measurement of alternating current quantities.
  • There are possibilities of damage to phosphor bronze fiber or helical restoring spring due to severe stress.