Is EMF a force or energy

Difference Between EMF and Voltage

One of the main differences between EMF and voltage is that EMF is the energy added to the charge, while voltage is the energy required to move the unit's charge from one point to another. The other differences are explained in the comparison table below.

Content: EMF Vs voltage

  1. Comparison table
  2. definition
  3. Main differences

Comparison table

Basis of comparisonEMFVoltage
definitionThe amount of energy delivered by the source for each charge.Energy consumption per unit to get from one point to another
formula
symbolεV
measure upMeasure between the end point of the source when there is no current flowing through it.Measure between any two points.
sourceDynamo, electrochemical cell, transformer, solar cell, photodiode, etc.Electric and magnetic field

Definition of tension

Voltage is defined as the energy needed to move the unit charge from one point to another. It is measured in volts and represented by the symbol V. The voltage is caused by the electric and magnetic fields.

The voltage is developed between the ends (i.e. cathode and anode) of the source. The potential of the source's positive endpoint is higher than that of the negative points. When the voltage develops across the passive element, it is called a voltage drop. According to Kirchoff's law, the sum of the voltage drops in a circuit is equal to the EMF.

Definition of EMF

The supply of energy from the source to each coulomb's charge is known as the EMF. In other words, it is the power supply from an active source, such as the battery, to charge the coulomb unit. The EMF stands for the electromotive force. It is measured in volts and represented by the symbol ε.

The electromotive force of the above circuit is represented by the formula
Where, r - internal resistance of the circuit.
R - External resistance of the circuit.
Electromotive force.
I - currently

Main differences between EMF and voltage

  1. The EMF is the measure of the energy input to each charge coulomb, while the voltage is the energy it takes for a charge coulomb to travel from one point to another.
  2. The EMF is represented by the ε, while the symbolic representation of the voltage is V.
  3. The EMF is measured between the endpoint of the source when there is no current flowing through it, while the voltage is measured between any two points on the closed circuit.
  4. The EMF is generated by the electrochemical cell, dynamo, photodiodes, etc., while the voltage is caused by the electric and magnetic fields.

Volt is the SI unit of both EMF and voltage.