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

Here,

Voltage, V = 220 V

Current, I = 5 A

Power, P = V x I = 220V X 5 A = 1100 Watts

Thus, the power of the motor is 1100 watts.

Now,

Power, P = 1100 W (Calculated above)

Time, t = 2 hour = 2 x 60 min x 60 sec

=

= 7200 s

So, Energy, E = P x t

E = 1100W X 7200 sec

= 7.92xJ

Thus, the energy consumed is 7.92 x 10⁶ joules.