Question

An electric motor takes 5 ampere from a 220 volt line. Determine the power of the motor and energy consumed in 2 hours.

Answer 1

Answer:

P=I.V

P=5(220)

P=1.1 kwH

Time=2hours

Energy=P.T

1.1(5)

=5.5kwH

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