Question

An electric heater of resistance 8ohms draws 15A from the service main calculate at what rate is the cost of operating energy developed

Answer 1

Answer:

1800 watt

Explanation:

According to the given question,

R = resistance = 8 Ohm

I = Current = 15 Amp

P = Power and H = Energy and t = time

And we are asked to find the rate of energy.

We know,

• Energy = Power× time

• Power = Energy/ time

Thus power is rate of energy. We also know,

• P = I^2 × R

putting the given values we get,

• P = 225×8

• P = 1800 watt