Answer to Question #163681 in Electricity and Magnetism for bibo

Question

Two coils are wound around the same cylindrical form. When the current in the first coil is

decreasing at a rate of -0.242 A/s, the induced emf in the second coil has a magnitude of 1.65 x

10^-3 V and the mutual inductance of the two coils is 6.82 mH. If the current in the first coil

becomes constant, what happens to the mutual inductance?

Answer 1

Answer

According to physics in general

 M is the mutual inductance, which depends on various factors, including the area and number of turns in coil 2, the distance between the two coils, the relative orientation of the two coils, the number of turns / unit length in the first coil (because that's what the magnetic field produced by the first coil depends on), and whether the two coils have cores made from ferromagentic material.

So mutual inductance remain same.