Question

Which of the following electric cell can be used in a circuit where $20J$ of energy is required to move a charge of $5C$?

• A. $A$
• B. $B$
• C. $C$
• D. $D$

Answer 1

The correct option is C $C$

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

From the definition of potential difference,
$V=\frac{W}{Q}$
$V=\frac{20J}{5C}$
$V=4V$

Hence, we need a potential difference of $4V$ to move $5C$ of charge if $20J$ of energy is consumed.
So the cell C can serve our purpose.