1.

Distinguish between e.m.f and potential difference.

Answer»
Electromotive force (emf)Potential Difference (Pd)
E.m.f is the energy supplied to the unit charge by the cell.Potential difference is the energy dissipated as the unit charge passes through the components.
The emf is also present even when no current is drawn through the battery.Potential difference across the conductor is zero in the absence of current.
Its unit is volt.Its unit is volt.
Its symbol is E.Its symbol is V.

Its formula is E = I (Rtr)

Rtr = total external and internal resistance.

Its formula is V = E – Ir



Discussion

No Comment Found

Related InterviewSolutions