When current flowing through one coil changes from 0 Amp to 15 Amp in 0.2s, an emf of 750 V is induced in an adjacent coil. Calculate the coefficient of mutual inductances of the two coils.

What is meant by the time constant of an LR circuit? When the current flowing through a coil P decreases from 5 A to 0 in 0.2 seconds, an emf of 60 V is induced across the terminals of an adjacent coil Q. Calculate the coefficient of mutual inductance of the two coils P and Q.

The current in a coil is changed from 5A to 10A in 10^(-2) s. Then, an emf of 50mV is induced in a coil near by it. Calculate mutual inductance of two coils.

When the current changes from +2A to -2A in 0.05s , and emf of 8V is induced in a coil. The coefficient of self-induction of the coil is

When the current in a coil charges from 2A to 4A in 0.5 s, emf of 8 volt is induced in the coil. The coefficient of self induction of the coil is -

When current in a coil changes from 25 A to 12 A in 0.1 s , average voltage of 50 V is produced .The self inductance of the coil is

If the current in the primary circuit of a pair of coils changes from 5 amp to 1 amp in 0.02 sec, calculate (i) induced emf in the secondary coil if the mutual inductance between the two coils is 0.5H and (ii) the change of flux per turn in the secondary, if it has 200 turns.

When current in a coil changes from 5 A to 2 A in 0.1 s, average voltage of 50 V is produced. The self - inductance of the coil is :

The current decays from 5A to 2A in 0.01s in a coil. The emf induced in a coil nearby it is 30V. Calculate the mutual inductance of the coil.

When current flowing in a coil changes from 3A to 2A in one millisecond, 5 volt emf is induced in it. The self-inductance of the coil will be-

In a coil current falls from 5 A to 0 A in 0.2 s. If an average emf of 150 V is induced, then the self inductance of the coil is