A long solenoid of length l, crosssectional area A and having `N_1` turns(primary coil), has a small coil of `N_2` turns (secondary coil) wound about its centre. Determine the Mutual inductance (M) of the two coils.

An emf of 96.0 mV is induced in the windings of a coil when the current in a nearby coil is increasing at the rate of 1.20 A/s . What is the mutual inductance (M) of the two coils ?

Flux associated with second coil having 1000turns changes by 6 xx 10^-4 Wb per turn due to change in current of 3 A in one coil. Find the mutual inductance of pair of coil

Two coils having self inductance L_1 = 75 mH and L_2=55 mH are coupled with each other. The coefficient of coupling (K) is 0.75 . Calculate the mutual inductance (M) of the two coils.

A long solenoid of length L has a mean diameter D . It has n layers of windings of N turns each. If it carries a current ‘i’ the magnetic field at its centre will be

A coil is wound on a frame of rectangular crosssection. If all the linear dimensions of the frameare increased by a factor 2 and the number ofturns per unit length of the coil remains the same,then the self-inductance of the coil will increaseby a factor o

A coil having 100 turns carrying current of 2 mA has self-inductance 10 mH. Find the magnetic flux linked with each turn of the coil

A long solenoid ‘S’ has ‘n’ turns per meter, with diameter ‘a’. At the centre of this coil we place a smaller coil of ‘N’ turns and diameter ‘b’ (where b < a). If the current in the solenoid increases linearly, with time, what is the induced emf appearing in the smaller coil. Plot graph showing nature of variation in emf, if current varies as a function of mt^2 + C .

The ratio of the turns in the primary and secondary coils of transformer is1: 9. The ratio of the current in the primary to secondary is