Question

when an electric heater is connected with 220 v line, it consumes 4.4kw power. calculate the current in the heater and resistance of the heater

Answer 1

Answer:

i. Current passing

Formula used,

Power formula è P = VI

P = power

V = Voltage

I = Current

I = 20 A

ii. Resistance of heater

Formula used

Power Formula

P = power

V = voltage

R = resistance

R = 11Ω

iii. Energy consumed in 2 hrs

The power is 4.4 kW; It means that 4400 joules is consumed in 1 sec

In 2 hrs è 3600 x 2 secs

The energy consumed will be

= 4400 x 3600 x 2

= 3.168 x 107 joules