Question

An electric kettle draws a current of 4 A for 5 min. If the resistance of its element is 100 Ω, the energy drawn by kettle in kilo joules is:

विकल्प

• 240 kJ

• 360 kJ

• 720 kJ

• 480 kJ

Answer 1

480 kJ

Explanation:

Convert 5 min to 300 s

$$W = I^2Rt$$

$$= 4^2 \times 100 \times 300$$

$$= 480000\ \mathrm{J}$$

$$= 480\ \mathrm{kJ}$$