Magnetic field lines inside a bar magnet go from MCQ with Answer and Explanation
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Question #1
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If the error in measurement of radius of a sphere is 2%, the percentage error in the calculated volume of the sphere will be:
Correct Answer: Option D
Explanation:
Volume of sphere V = (4/3)πr³. For error propagation, percentage error in V = 3 × (percentage error in r). Given error in r is 2%, so error in V = 3 × 2% = 6%. This follows the power rule: if Q = xⁿ, then % error in Q = |n| × % error in x. This principle is crucial for experimental error analysis. Exam tip: Remember that volume depends on cube of radius, so errors amplify threefold. This type of question tests understanding of error propagation in derived quantities.
Volume of sphere V = (4/3)πr³. For error propagation, percentage error in V = 3 × (percentage error in r). Given error in r is 2%, so error in V = 3 × 2% = 6%. This follows the power rule: if Q = xⁿ, then % error in Q = |n| × % error in x. This principle is crucial for experimental error analysis. Exam tip: Remember that volume depends on cube of radius, so errors amplify threefold. This type of question tests understanding of error propagation in derived quantities.
Question #2
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A person weighs 60 kg on Earth. His weight on moon will be (g_moon = g/6)
Question #3
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The process of heat transfer in a solid metal rod is
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