Question

A battery of EMF $2V$ and internal resistance $5\Omega$ is being charged with a current of $0.1A$. Calculate the potential difference between terminal of the battery.

• A. $5V$
• B. $2V$
• C. $2.5V$
• D. $10V$

Answer 1

The correct option is C $2.5V$

Given : $E=2V$ $r=5\Omega$ $I=0.11A$

Potential difference across its terminal $V=E+Ir$

$\therefore$ $V=2+0.1\times 5=2.5V$