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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?

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Solution

Given that,

Voltage V=220V

Current I=0.5A

Now, rate at which the electrical energy transformed

P=V×I

P=220×0.5

P=110watt

Now, the energy is transformed in 2 min

P=Et

E=P×t

E=110×120

E=13200J

Hence, the energy transformed is 13200 J


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