Question

A 4 kilowalt heater is connected to 220 source of power calculate the current drawn by the heater resistance also the energy consum in 2 hrs?​

Answer 1

Explanation:

GIVEN =

V= 220 volts

time = 2 hrs

Power = 4kw

Energy = 4 × 2

8 watt per hour

Current drawn

Power = V × I

4 = 220 × I

I = 4 /220

0.018 ampere

Answer 2

V=220 volts
P=4kW=4000W
t=2 hrs= 120 mins = 7200 s


Now, P=VI
Therefore, I=P/V=4000/220=18.18

Hence Current drawn is 18.18 A


Energy consumed= P x t= 4000 x 7200 Ws = 4 x 2 kWh= 8 kWh


Hence energy consumed is 8kWh