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An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
Here, I = 5 A, V = 220 V, t = 2 h = 2 × 3600s
From the formula,
P = VI
= 5 × 220
= 1100 W
Heat = Power × time
= 1100 × 2 × 3600
= 7920000 J
= 7.92 × 103 KJ
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