Question

a current of 5 ampere is passed for 2 hours in an electric iron having a resistance of 100 ohms calculate the heat produced

Answer 1

`\boxed{\sf Heat \ produced \ (H) = 5 \ kWh}`

Given:

Resistance (R) = 100 Ω

Current (I) = 5 A

Time (t) = 2 hours

To Find:

Heat developed (H) in the electric iron

Step-by-step explanation:

Formula:

`\boxed{ \bold{ \sf H = I^2Rt}}`

Substituting values of I, R & t in the equation:

`\sf \implies H = {5}^(2) * 100 * 2 \\ \\ \sf \implies H = 25 * 100 * 2 \\ \\ \sf \implies H = 5000 \\ \\ \sf \implies H = 5 \: kWh`

`\therefore`

Heat developed (H) in the electric iron = 15 kWh