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JEE Main & Advanced Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Self Evaluation Test - Alternating Current

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

    A) 20 seconds

    B) 5 seconds

    C) 1/5 seconds

    D) 40 seconds

    Correct Answer: B

    Solution :

    [b] Time constant is L/R Given, L=40H & \[R=8\Omega \]         \[\therefore \,\,\,\tau =40/8=5\,\sec \]


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