Question

an electric motor takes 5 ampere from a line 220v determine the power of motor and energy consume in 2 hours

Answer 1

Given that electric current (I) = 5A, Potential difference (V) =220V

Time (t) =2h=2×60×60s=7200s

 Now Power (P) is given by the expression

P=VI

  =220×5watts

  =1100w


Now Energy consumed by the motor

H= Pt

   =1100×7200J

   =7.92 × 106 J

Answer 2

Answer:

Explanation:

Given :-

Voltage, V = 220 V

Current, I = 5 Ampere

Time, t = 2 hours

To Find  :-

Power

Electrical Energy consumed.

Formula to be used :-

Power = Voltage × Current

Electrical Energy consumed =  Voltage × Current × Time

Solution :-

Putting all the values, we get

Power = Voltage × Current

Power = 220 V × 5 A

Power = 1100 VA

Power = 1100 W

Power = 1.1 kW

Electrical Energy consumed =  Voltage × Current × Time

Electrical Energy consumed = 220 V × 5 A × 2 h

Electrical Energy consumed = 2.2 kWh

Hence, the power of motor is 1.1 kW and energy consume in 2 hours is .2 kWh.