alleryA 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: syllabus Physics Part I, Chapter 6, Electromagnetic Induction._
Keep practising Electromagnetic Induction
Browse all Electromagnetic Induction questions for CBSE Class 12 (Science), or explore more Physics topics.
Related questions
Lenz's law says the induced current also exerts a mechanical force that does what?For coils 1 and 2, how are the mutual inductances M12 and M21 related?By Lenz's law, how does an induced current flow?In the energy stored in a coil, to which mechanical quantity is L analogous?The dimensions of inductance equal the dimensions of flux divided by those of which quantiA generator coil turns at 50 revolutions per second. How long does one full cycle of its eGenerators driven by high-pressure steam from burning coal are called what?When the emf of a rotating coil is at its peak value, what is true of the flux through the