Question

what is electro motive force?

Answer 1

Electromotive force also known as emf is energy per unit charge that is imparted by an energy source

Answer 2

Answer- The above question is from the chapter 'Current Electricity'.

Given question: What is electromotive force?

Answer: Electromotive force-

1. Electromotive force is the potential of electricity which can be produced on changing magnetic field or electrochemical cell.

2. Its SI unit is Volt.

3. Its short form is emf.

4. Its symbol is ε.

5. Formula of electromotive force:

ε = V + Ir

Where, V is the voltage, I is the current across the circuit, r is the cell's internal resistance and  ε is the electromotive force.