Question

A bulb of $2.5V$, draws a current of $0.5A$. If the bulb is switched on for 2 minutes, calculate the energy released by the bulb.

• A. $1.25J$
• B. $260J$
• C. $5J$
• D. $150J$

Answer 1

The correct option is D $150J$

P.D $=2.5V$
Current $=0.5A$
$t=2$ minute $=2\times 60=120s$
$E=V\times I\times t=2.5\times 0.5\times 120=150J$.