Two inductor coils having self inductance `l_1` and `l_2` respectively. Their mutual inductance is proportional to :

The inductors of self inductance L_(1) and L_(2) are put in series .

In the figure shown the key is switched on at t=0 . Let l_1 and l_2 be the currents through inductors having self inductances L_1 and L_2 at any time t respectively. The magnetic energy stored in the inductors 1 and 2 be U_1 and U_2 . Then U_1/U_2 at any instant of time is:

Two inductors coils of self inductance 3H and 6H respectively are connected with a resistance 10Omega and a battery 10V as shown is figure. The ratio of total energy stored at steady state in the inductors to that of heat developed in resistance in10second at hte steady state is (neglect mutual inductance between L_(1) and L_(2)

Two coils have self-inductance L_(1) = 4mH and L_(2) = 1 mH respectively. The currents in the two coils are increased at the same rate. At a certain instant of time both coils are given the same power. If I_(1) and I_(2) are the currents in the two coils, at that instant of time respectively, then the value of (I_(1)//I_(2)) is :

The coefficient of self inductance and the coefficient of mutual inductance have

Inductance : Self and Mutual

A circuit contains two inductors of self-inductance L_(1) and L_(2) in series (Fig) If M is the mutual inductence, then the effective inductance of the circuit shows will be

Two different coils have self inductances L_1=9mH and L_2=2mH . The current in one coil is increased at a constant rate. The current in the second coil is also increased at the same constant rate. At a certain instant of time, the power given to the two coils is the same. At that time, the current the induced voltage and the energy stored in the first coil are i_1,V_1 and W_1 respectively. Corresponding values for the second coil at the same instant are i_2,V-2 and W_2 respectively. Then,

(A): When number of turns in a coil doubled, coefficient of self inductance of the coil becomes four times. (R): Coefficient of self inductance is proportional to the square of number of turns.

Two coils of self inductance L_1 and L_2 are placed near each other so that the total flux in one coil is partially linked with the other. Their mutual inductance (M) will be given by