Question

An electric motor takes 5A from 220 volt line,determine the power of motor and energy consumed in 2h

Answer 1

Explanation:

power=voltage*current

P=V*I

P=220*5

P=1100watts

power is the rate of energy consumption,

so

E=P*t

t=2 hours=2*60*60secs

t=7200sec

so E=1100*7200

E=7920000 joules in 2 hours

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