Q
If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?
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A
A. Less than that of disc but in opposite direction
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B
B. Equal to that of disc and in the same direction
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C
C. Equal to that of disc and in the opposite direction
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D
D. Less than that of disc and in the same direction
Correct Answer:
D. D. Less than that of disc and in the same direction
