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NEET Sample Paper NEET Sample Test Paper-25

  • question_answer
    A coil of 40 H inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 V battery. The time constant of the circuit is

    A)  5 s

    B)  1/5 s

    C)  40 s

    D)  20 s

    Correct Answer: A

    Solution :

    Time constant of L-R circuit is, \[\tau =\frac{L}{R}\] Here, \[L=40\,H,\,R=8\,\Omega ,\,E=2V\] \[\therefore \]\[\tau =\frac{40}{8}=5\,s\]


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