An electric motor takes 5 A from a 220 V line

Question 2:

An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.

Solution:

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