Difference between energy and power

Definition:
Energy: Energy is the capacity to do work. Energy is power integrated over time.
Power: Power is the rate at which work is done or must be energy is transmitted.

Here this post gives the difference between energy and power to better understand this topic.

The main key difference between energy and power are listed below:
  • Energy can be defined as the capacity of the object to perform work, while power implies the rate at which work is done upon an object.
  • Energy indicates how much work a person can do? Whereas power represents how quickly work can be done?
  • Energy is indicated by W, while power is indicated by P.
  • Energy is neither generated not destroyed it is only turned from to another on the contrary power cannot be transformed from one form to another.
  • Energy can be measured in terms of joules which is equal to watt seconds as power is expressed in terms of watt which is equal joules per second.
  • Conversion of energy is possible to power cannot be stored.
  • Energy is time quantity or component while power is an instantaneous quantity.
  • Various type of energy like kinetic, thermal, sound, electromagnetic, elastic, light, etc while a different type of power like electric power, human power, optical power, etc.
  • Energy is known to be stored which can be used in the future, Power quantity is not suitable or cannot be stored.
  • Energy is used in moving car, heating home, flying an airplane, lighting night, etc, Power finds its uses in mechanical applications, electrical applications, heat applications, etc.
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Difference between work and power

Work and power are two very important concepts discussed in mechanics. Work describes the amount of energy transferred, while power describes the rate of energy transfer. Both of these concepts are very important in fields such as engineering, Thermodynamics, physics, and even every human biology. Here this post gives the discussion of what work and power are, their similarities, applications and the most important difference between them.

The main key difference between work and power are listed below:
  • Work is measured in joule whereas power is measured in Watt.
  • Both are a scalar quantity.
  • Power is used more often than work.
  • Power is the rate at which work is being to be done.
  • Work represents the amount of energy transferred when doing something, power represents how fast the energy was transferred.
  • The equation of calculating work is work = force * displacement, The equation to calculate power is power = Work/ time.
  • An object can have for the power without doing work. If the object does any work the value of the power cannot be zero.
  • Work can also be measured in units like electrons volt(eV), kWh, MWh, and GWh, Energy is also measured in units like kW, MW, and GW.
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Difference between diode and rectifier

The diode and rectifier both semiconductor device but are used in different application due to their different functioning. A diode is a device that allows the flow of current in one direction only while in rectifier is a diode that is able to convert the current from AC to DC. Here this post gives the difference between diode and rectifier to better understand this topic.

Definition:

Diode: A diode is a semiconductor device which conducts when it is forward biased and becomes open circuit when it is reversed biased.
Rectifier: Rectifier is a circuit which consists of a diode, step down transformer and filter circuit which collectively converts AC into pulsating DC.

The main key difference between diode and semiconductor are listed below:
  • The diode is a semiconductor device but a single element or entity in an electronics circuit, While in rectifier itself is an electronics circuit which consists of several elements as its components among which diode holds a crucial place.
  • A diode is a device that allows the flow of current in one direction only, a rectifier is a diode that able to convert from AC to DC.
  • A diode is a semiconductor device which conducts uni-directionally and acts as a switch, while the rectifier is the semiconductor device which converts alternating current into pulsating direct current.
  • Current carrying capability of the diode in low, while rectifier has higher current capability than the conventional diode.
  • Diode example like tunnel diode, PIN diode, Photodiode, Zener diode, etc while the rectifier is basically divided into two categories that are single phase and 3 phase rectifier and single phase is also further subdivided into half wave rectifier and full wave rectifier.
  • A diode is used in switches, clippers and clampers, etc while the rectifier is used in computers, battery, chargers, modulators, demodulators, DC motors, etc.


Difference between conductor and semiconductor

Basically. semiconductor and conductor are mainly used in different types of electrical and electronics components. The main comparison between conductor semiconductor can be aspects like conductivity variation, electrical resistivity, temperature coefficient, energy bands and current carriers are represented below difference from.

The main key difference between conductor and semiconductor are listed below:
  • The resistivity of the conductor is low, whereas semiconductor is moderate.
  • The temperature coefficient of a conductor is positive, whereas semiconductor has constant.
  • The conductivity of the conductor is high, whereas semiconductor is moderate.
  • The conductor has a large number of electrons for transmission, whereas semiconductor has a very limited number of electrons for transmission.
  • The conductor doesn't have forbidden gap while semiconductor has forbidden gap.
  • The amount of current carrier at the usual temperature in the conductor is very high whereas semiconductor it is low.
  • The resistivity value of the conductor is less than 10-5 ohms meters so it is negligible whereas semiconductor has among the values of conductors and insulator.
  • The valence electrons are a conductor is one in the outer most shell, but in semiconductor, it is four.
  • The 0-kelvin behavior of conductor acts as a superconductor whereas in semiconductor acts as an insulator.
  • The flow of current in a conductor is due to free electrons whereas in semiconductor due to holes as well as free electrons.
  •  The formation of the conductor can be done by metallic bonding whereas in semiconductor it can be formed by covalent bonding.
  • The band overlap in a conductor in both the valence and conduction bands are overlapped whereas in semiconductor both bands are divided with an energy space of 1.1 eV.
  • The main example of a conductor is copper, silver, mercury, and aluminum whereas semiconductor examples are silicon and germanium.

Difference between conductor and insulator

One of the major difference between the conductor and insulator is that the conductor allows the energy to pass through it, whereas the insulator does not allow the energy to pass through it. Here this article gives information about the difference between conductor and insulator to better understand this topic.

Definition:

Conductor: Conductor is a material which permits the electric current or heat to pass through it.
Insulator: Insulator was restricted the electric current or heat to pass through it.


Difference between conductor and insulator
Difference between conductor and insulator

The main key difference between conductor and insulator are listed below:
  • In the electric field,  the conductor exists on the surface but remain zero inside the conductor, Insulator does not exist on insulator.
  • Potential remains same at all the point on the conductor, insulator potential remains zero.
  • In magnetic field conductor store the energy, while insulator, not stores energy.
  • In conductor thermal conductivity is high,  while using insulator thermal conductivity is low.
  • Conductivity remains very high while using the conductor compared to the insulator.
  • A covalent bond is weak, while the insulator covalent bond is strong.
  • Resistance is very low in conductor compared to the insulator,
  • Electrons freely move in a conductor, while insulator electrons do not move freely.
  • Resistivity is varied from high to low while using insulator resistivity is high.
  • Temperature coefficient of the conductor is a positive temperature coefficient of resistance, while the insulator negative temperature coefficient of resistance.
  • There is no forbidden gap in conductor but in insulator large forbidden gap.
  • Valence band remains empty in conductor but insulator must be full of an electron in the valence band.
  • Conduction band in conductor full of electrons, while insulator conduction band remain empty.
  • Examples of a conductor are irons, aluminium, copper, and silver, while insulator rubber, wood, paper etc.
  • Application of conductor for making electrical wires and conductor, while insulator as insulation in electrical cable or conductor for supporting electrical equipment etc.

RTD vs thermocouple

RTD sensor measure temperature based on the resistance changes in a metal resistor inside while in thermocouple uses two metal wires to produce a voltage relative to the temperature present junction between them. Here the post gives information about the difference between RTD and thermocouple to better understand this topic.

The main key difference between RTD and thermocouple are listed below:
  • RTD accuracy 0.1 to 1 °C and thermocouple accuracy 0.5 to 5 °C.
  • Long term stability of RTD has 0.05 °C/ year while thermocouple has variable.
  • Thermocouple has linear while RTD has fairly linear.
  • RTD has rarely susceptible, but thermocouple has susceptible.
  • RTD has generally slow response time(1 to 50 s) while thermocouple has generally fast response time ( 0.01 to 10 s).
  • Temperature range is around 200 to 650 °C while thermocouple is around 200 to 1750 C°
  • RTD has a high cost, thermocouple has a low cost.
  • RTDs are superior to a thermocouple in that there are more accurate and more repeatable.
  • RTD has constant voltage and current while thermocouple has self-power.
  • RTD produce better and more reliable measurement while thermocouple is cheap, more durable and can measure a bigger range of temperature.

Difference between positive and negative feedback

The main key difference between positive and negative feedback loop is that the positive feedback loop amplifies the initiating stimulus moving the system away from its equilibrium whereas the negative feedback loop counteracts the change of the system, maintaining them in a set point. This post gives information about the difference between positive and negative feedback to better understand this topic.

  • Positive feedback is a less frequent mechanism, negative feedback is the more frequent mechanism.
  • Positive feedback is a wide range, negative feedback is narrower range.
  • Positive feedback is less associated with stability, negative feedback is closely associated with stability.
  • The overall phase shift of positive feedback is 0 or 360 degrees while negative feedback overall phase shifts 180 degrees. 
  • Overall gain is increased while using positive feedback, overall gain decreases while using negative feedback.
  • Positive feedback may be enhanced change, negative feedback resists change.
  • Positive feedback exhibits a positive correlation between stimulus product or process, negative feedback exhibits a negative correlation between stimulus and product or process.
  • Positive feedback may be associated with vicious cycles and even death, while negative feedback most often associated with restoring homeostasis.
  • Positive feedback may require external interruption, whereas negative feedback does not require external interruption.
  • while using Positive feedback input and output signal even noise change when increases due to feedback but in negative feedback input and output chances decreases due to feedback.
  • Positive feedback use as an oscillator, negative feedback use as an amplifier.