Question

An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.

Answer 1

Power (P) is given by the expression,

Where,

Voltage, V = 220 V

Current, I = 5 A

Energy consumed by the motor = Pt

Where,

Time, t = 2 h = 2 × 60 × 60 = 7200 s

P = 1100 × 7200 = 7.92 × 10⁶ J

Therefore, power of the motor = 1100 W

Energy consumed by the motor = 7.92 × 10⁶ J