NEET2026Physics-Current Electricity
NEET 2026 Physics Electric Power MCQ Question
Type: MCQ-numerical-Medium-Class 12
A room heater is rated 400 W, 220 V. If the supply voltage drops to 200 V, what will be the power consumed (approximately)?
A
200 W
B
400 W
C
331 W
D
121 W
Correct Answer
Option C
Detailed Explanation
The power consumed by the heater can be calculated using the formula P₀ = V₀²/R for rated power and Pₑ = V²/R for consumed power. By substituting the given values, we find that Pₑ = (200/220)² × 400 = 331 W.
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