Question

An electric bulb consumes 8640 J of energy while operating at 24 V for 30 min. The current drawn by the bulb is:

Options

• 0.4 A

• 0.3 A

• 0.2 A

• 0.5 A

Answer 1

0.2 A

Explanation:

Convert 30 min to 1800 s.

W = V × I × t

$$I = \frac{W}{Vt}$$

$$= \frac{8640}{24 \times 1800}$$

$$= 0.2\ \mathrm{A}$$