The sound of thunder is heard after the flash of lightning because MCQ with Answer and Explanation
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The principle of AC generator is
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In a step-up transformer, the primary coil has
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If the percentage error in measuring the radius of a sphere is 2%, what will be the percentage error in the calculation of its volume?
Correct Answer: Option B
Explanation:
The volume of a sphere is given by V = (4/3)πr³. The formula for relative error in volume is (ΔV/V) = 3 × (Δr/r). Since the percentage error in radius (Δr/r × 100) is 2%, the percentage error in volume will be 3 × 2% = 6%. Constants like 4/3 and π do not contribute to the error.
The volume of a sphere is given by V = (4/3)πr³. The formula for relative error in volume is (ΔV/V) = 3 × (Δr/r). Since the percentage error in radius (Δr/r × 100) is 2%, the percentage error in volume will be 3 × 2% = 6%. Constants like 4/3 and π do not contribute to the error.
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