Question

An electric fan runs from the 220 V mains. The current flowing through it is 0.5 A. At what rate is the electrical energy transformed by the fan? How much energy is transformed in 2 min?

Answer 1

Given that,

Voltage $V=220V$

Current $I=0.5A$

Now, rate at which the electrical energy transformed

$P=V\times I$

$P=220\times 0.5$

$P=110watt$

Now, the energy is transformed in 2 min

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

$E=P\times t$

$E=110\times 120$

$E=13200J$

Hence, the energy transformed is $13200J$