Question

An electric motor takes 10 ampere from a 220 volt line determine the power of motor and energy consumed in 2 hours

Answer 1

Answer:

P=2200 W

Total energy consumed in 2hrs = 1.584*10^7 J =4400 Wh

Explanation:

P=VI =220*10=2200 watt

Energy =P *t

           =2200*3600*2.........................3600sec.........2 hrs

           =1.584*10^7 J

OR energy=P*t=2200*2=4400Wh=4.4KWh

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