Question

An electric cell does $5$ joules of work in carrying $10$ Coulomb’s of charge around a closed circuit. The emf of the cell is

• A. $2V$
• B. $0.5V$
• C. $4V$
• D. $1V$

Answer 1

The correct option is B $0.5V$

we know work done by all
$W=qV$
$\Rightarrow 5=10\times V$
$\Rightarrow V=\mathrm{0.5.}V$