Question

Calculate the power of an electric bulb which consumes $2400J$ in a minute

• A. $80W$
• B. $120W$
• C. $60W$
• D. $40W$

Answer 1

The correct option is D $40W$

Power is the energy consumed per unit of time.

Here, energy consumed,

$E=2400J$,

and time

$t=1min=60s$

$P=\frac{E}{t}$

$\Rightarrow P=\frac{2400}{60}$

$\Rightarrow P=40W$