KVPY Sample Paper KVPY Stream-SX Model Paper-25

  • question_answer
    The capacitor shown in figure 1 is charged completely by connecting switch S to contact a. If switch S is thrown to contact b at time \[t=0,\]which of the curves in figure 2 above represents the magnitude of the current through the resistor R as function of time t?

    A) J

    B) K

    C) L         

    D) M

    Correct Answer: A

    Solution :

    The potential difference across completely charged capacitor is V. As the switch is pushed to b, the initial current in the resistor R is \[\frac{V}{R}.\] Hence J is the correct option.

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