Question

An electric heater of power 3 kW is used for one minute.Find the energy supply by the heater.

Answer 1

Given that,

Power $P=3kw$

Time $t=1min=60s$

We know that,

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

$E=P\times t$

$E=3\times {10}^3\times 60$

$E=180\times {10}^3$

$E=18\times {10}^{4}J$

Hence, the energy supply by the heater is $18\times {10}^{4}J$