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

  • question_answer
    The primary of a transformer when connected to a dc battery of 10 volt draws a current of 1 mA. The I number of turns of the primary and secondary windings are 50 and 100 respectively The voltage in the secondary and the current drawn by the circuit in the secondary are respectively

    A) 20 V and 0.5 mA

    B)      20 V and 2.0 mA                     

    C) 10 V and 0.5 mA

    D)                       Zero and therefore no current           

    Correct Answer: D

    Solution :

    [d] A transformer is essentially an A C device. DC source so no mutual induction between coils \[\Rightarrow \,\,{{E}_{2}}=0\]and \[{{I}_{2}}=0\]


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