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Question

Consider the circuit shown in figure. Switch S is closed at for t < 0, and steady state conditions are established. Switch is then opened at t = 0. Immediately after opening switch, choose the correct options.
  1. Current in branch BC is 3V8R
  2. Current in branch AB remains same in magnitude and direction.
  3. Potential difference across L2 is V
  4. Current through L2 is 3V8R


Solution

The correct options are
A Current in branch BC is 3V8R
C Potential difference across L2 is V
Current through L1 and L2 does not change just after opening switch. Then using junction law at D and by K.L.L we find p.d across L2 and L1

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