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Electric circuits miscellaneous

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Electric circuits miscellaneous
  1. In the given figure, the switch was closed for a long time before opening at t = 0. The voltage Vx at t = 0+ is

    1. 25 V
    2. 50 V
    3. – 50 V
    4. 0 V
Correct Option: C

At t = 0+ , the circuit will be as shown below.

I L (0+) = 0
Then Vi = – 50 V


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