what is the difference between potential difference and electromotive force?

Asked by kavitajain217 | 8th May, 2016, 07:05: PM

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 Abhijeet Mishra | 27th Nov, 2017, 03:00: PM