Question

An electric motor takes 5 A from a 220 V line determine the energy consumed by it in 2 hrs A) 1.98×10 power 3 J B) 2.24×10 power3 J C) 6.85×10 power 3 J D) 3.96×10 power 3 J Pls tell the option

Answer 1

$\huge{\underline{\tt{\red{Answer-}}}}$

Energy consumed by the motor = 7.92 x 106 J

Explanation:

First of all, the Power (P) is given by the expression,

$P = VI$

Where,

Voltage,V = 220 V

Current, I = 5 A

$P= 220 * 5 = 1100 W$

and Energy (E) consumed by the motor = Pt

Where, T=  time and P= power

$T = 2 h = 2 * 60 * 60 = 7200 s$

$P= 1100 * 7200 = 7.92 * 106J$

Therefore, power of the motor = 1100 W

Energy consumed by the motor = 7.92 x 106 J