Question

Which of the following electric cells can be used in a circuit where $20joule$ of energy is required to move a total charge of $5coulomb$?

• A. Cell $A$
• B. Cell $B$
• C. Cell $C$
• D. Cell $D$

Answer 1

The correct option is C Cell $C$

Given,
Work done, $W=20J$
Total electric charge, $Q=5C$

The potential difference($V$) is the work done in moving a unit positive electric charge from one point to another in a current carrying conductor.

$\therefore V=\frac{W}{Q}$
$\Rightarrow V=\frac{20}{5}$
$\Rightarrow V=4V$
$\therefore$ Cell $C$ should be used in the circuit.