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

Answer:

P=1100 W

Total energy consumed in 2hrs = 7.92*10^6 J =2200 Wh

Explanation:

P=VI =220*5=1100 watt

Energy =P *t

           =1100*3600*2.........................3600sec.........2 hrs

           =7.92*10^6 J

OR energy=P*t=1100*2=2200Wh=2.2KWh

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