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
- Comparison table
- Main differences
|Basis of comparison||EMF||Voltage|
|definition||The amount of energy delivered by the source for each charge.||Energy consumption per unit to get from one point to another|
|measure up||Measure between the end point of the source when there is no current flowing through it.||Measure between any two points.|
|source||Dynamo, 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.
R - External resistance of the circuit.
I - currently
Main differences between EMF and voltage
- 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.
- The EMF is represented by the ε, while the symbolic representation of the voltage is V.
- 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.
- 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.
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