Home › CBSE Class 12 (Science) › Physics › Electromagnetic Induction › For coils 1 and 2, how are the mutual inductance…
For coils 1 and 2, how are the mutual inductances M12 and M21 related?
AThey are always equal
BM12 is double M21
CM12 is half of M21
DThey differ in sign
Answer & Solution
Correct answer: A. They are always equal
Reciprocity of the coupling makes mutual inductance the same whichever coil carries the changing current.
Related questions
What are the dimensions-based units of emf, as listed for electromotive force?Induced emf in a loop is what when the flux through it stays constant?A generator coil's plane is perpendicular to the field. What is the emf then?In an ac generator, the angle between B and the coil's area vector at time t is wt. What iThe speed of rotation of an ac generator coil is doubled, other things equal. How does theA coil has 50 turns, area 0.02 square metre, in a 0.4 T field, rotating at 100 rad/s. WhatA coil of N turns, area A rotates at n revolutions per second in a field B. What is the maHow are the ends of the coil of an ac generator joined to the external circuit?