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CBSE - X - Physics - Electricity

what is the difference between potential difference and electromotive force?

Asked by kavitajain217 8th May 2016, 7:05 PM
Answered by Expert

Answer:

What is the difference between potential difference and electromotive force?
 
Potential Difference
  • Potential difference (PD) is the work done in moving a unit charge against the electric field  between two specific points in the circuit.
  • Potential difference can also be defined as the work done per unit charge to move a charge between the negative and the positive terminal of the battery
  • The potential difference is applicable to magnetic, gravitational, and electric fields.
  • SI unit of potential difference is volt (V).

Electromotive Force

  • Electromotive force is the total voltage in an electric circuit generated by the source or battery.
  • It is not a physical or a mechanical force.
  • EMF is the energy required to move a unit positive charge from the negative terminal of the battery to the positive terminal when the circuit is open (open circuit means a discontinuous circuit wherein there is no flow of current)
  • This is applicable only to an electrical field.
  • Its SI unit is also volt (V).

Answered by Expert 27th November 2017, 3:00 PM

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