12th Class Physics Alternating Current / प्रत्यावर्ती धारा Question Bank Assertion And Reason (MCQs) - Alternating Current

  • question_answer
    Assertion: Transformers are used only in alternating current source not in direct current.
    Reason: Only A.C. can be stepped up or down by means by transfer.
     

    A) If both assertion and reason are true and reason is the correct explanation of assertion.

    B) If both assertion and reason are true and reason is not the correct explanation of assertion.

    C) If assertion is true but reason is false.

    D) If both assertion and reason are false.

    E) If assertion is false but reason is true.

    Correct Answer: A

    Solution :

    Transformers which convert low voltages into higher ones are called step up transformers, while those which convert high voltages into lower ones are called step down transformers. This is possible only for a.c. source and not for d.c. source.


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