Question

Two bulbs of 100 W and 200 W working at 220 volt are joined in series with 220 volt supply. Total power consumed will be approximately.

• A. 65 watt
• B. 33 watt
• C. 300 watt
• D. 100 watt

Answer 1

Answer: (A)

65 watt

Answer 2

$P_{S} = \frac{P_{1}P_{2}}{P_{1} + P_{2}} = \frac{100 \times 200}{100 + 200} = \frac{200}{3} \approx 65watt$