Question

The emf of a simple voltaic cell is about:

• A. $0.5V$
• B. $0.75V$
• C. $1.0V$
• D. $1.25V$

Answer 1

The correct option is C

$1.0V$

Explanation for correct option:

Option (C):

1. The maximum potential distance between two electrodes of a cell is the electromotive force of a cell or a cell's EMF.
2. It can also be defined as the net voltage between the half-reactions of oxidation and reduction.
3. The electromotive force of this cell is about $1V$.
4. Electrochemical cells, thermoelectric devices, solar cells, photodiodes, electrical generators, transformers and even Van de Graaff generators are among the devices that can provide EMF. Emf is produced in nature as variations in the magnetic field occur over a surface.

Hence, option (C) is correct.