STANDARD Physics Electric Power MCQ Question
Two electric bulbs, rated at (25 W, 220 V) and (100 W, 220 V), are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs draw powers P₁ and P₂ respectively, then
P₁ = 9 W, P₂ = 16 W
P₁ = 16 W, P₂ = 4 W
P₁ = 4 W, P₂ = 16 W
P₁ = 16 W, P₂ = 9 W
Correct Answer
Detailed Explanation
The power drawn by each bulb is calculated using the formula P = V²/R. The resistance for each bulb is calculated and then the power is determined based on the series connection.
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