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A magnet dropped through an aluminium pipe, compared with a PVC pipe, takes:
AHalf the time
BMuch longer
CMuch less time
DExactly the same
Answer & Solution
Correct answer: B. Much longer
1. Aluminium is a conductor, PVC is not.
2. Eddy currents in the aluminium oppose the falling magnet.
3. So it takes much longer.
_Source: NCERT Class 12 Physics Part I, Chapter 6, Electromagnetic Induction._
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