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प्रश्न
An electric motor takes 5 amperes current form a 220 volt supply line. Calculate the power of the motor and electric energy consumed by it in 2 hours.
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उत्तर
Given:
I = 5 A
V = 220 V
Power of the motor,
P = VI
=` 5 xx 220`
= 1100 W = 1.1 kW
Energy consumed in two hours,
E`= pxxt`
= `1.1 kW xx 2 h`
= 2.2 kWh
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