Question

An electric motor takes 5a from a 220v line determine the power of the motor and the energy consumed in 2hours

Answer 1

given I = 5A
        V = 220V
∴ power = V*I
             = 5*220  
             = 1100 W
             = 1.1kW
Energy consumed = Power*Time
                           = 1.1*2
                          = 2.2 kW*hr

Answer 2

Answer:

Electric current = 5 A

potential different = 220 V

Time = 2 x 60 x 60 = 7200

P = VI

220 x 5 V

=> 1100 w

Energy consumed by motor,

=> 1100 x 7200

=> 7.92 x 10^6 J