Q.

In the circuit shown in Figure. The steady state currents I1 and I2 in the coils after the switch S is closed are given by

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a

I2=EL2RL1L2

b

I1=EL2RL1+L2

c

I2=EL1RL1+L2

d

I1=EL1RL1+L2

answer is A, D.

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Detailed Solution

          L1dI1dt=L2dI2dt L1I1=L2I2 I1I2=L2L1     .......(1)

Steady state current passing through the resistor is 

     I=I1+I2=ERI1+L1L2I1=ERI1=EL2RL1+L2 and I2=EL1RL1+L2

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