Punjab Medical Punjab - MET Solved Paper-1999

  • question_answer
    A tape-recorder records sound in the form of

    A)  variable resistance on the tape

    B)  magnetic energy

    C)  magnetic field on the tape

    D)  electrical energy

    Correct Answer: C

    Solution :

    A tape is coated with ting magnetic particles.    These particle get diamagnetised when electric signal passes through them. Therefore, records sound is produced in the form of magnetic field on tape.


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