Question

electric heater of resistance 500 ohm is connected to main supply for 30 minutes if 5 ampere current flows through filament of foetus calculate heat energy produce

Answer 1

Given
Resistance of electric heater = 500 ohm
Time taken = 30 min = 30*60 = 1800 s
Amount of current flowed = 5 A

Heat energy produced = (current)² * resistance * time
                                     = 25*500*1800
                                     = 22500000 J
                                     

Answer 2

We have to calculate the heat energy produced in the heater when the electric heater is of resistance 500 ohms.

And the time of main supply is 30 minutes.

The given Current = I = 5A

Time = 30 minutes.

Converting this time into seconds = 30 × 60 = 1800 seconds.

We know the formula to find heat energy, that is :

H = I²Rt

So ,

H = (5)²×500×1800

= 22500000 J = 2.25 × 10^7

The required heat energy produced in the heater is 2.25 × 10^7 J