Question

Choose the correct statement about the cell.

A)The terminal voltage of a cell is always greater than e.m.f.

B)The terminal voltage of a cell is always less than e.m.f.

C)The terminal voltage of a cell may be greater, lesser or equal to e.m.f.

D)The terminal voltage of cell is always equal to e.m.f.​

Answer 1

Answer:

The terminal voltage of cell is always less than emf

Option B is correct

Answer 2

Option(B) - The terminal voltage of a cell is always less than e.m.f

• The e.m.f (electromotive force) is the potential difference across the terminals of a cell when it is not connected to any circuit.
• The terminal voltage (V) is the potential difference across the terminals when the cell is connected to the circuit.
• A slight voltage drop appears when the cell is connected to the circuit because of internal resistance.
• This brings us to the equation;-
    V = E - ir
             E = emf of the cell
             V =  terminal voltage
              i = current
              r =  internal resistance