Question

An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s.​

Answer 1

Answer:

• Heat = 15000J.

Explanation:

The amount of heat generated can be calculated using the Joule’s law of heating, which is given by the equation

➡ H = I²RT

Substituting the values in the above equation, we get,

➡ H = (5)² × 20 × 30

➡ H = 15000J.

The amount of heat developed by the electric iron in 30 s is 15000J.