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

  • question_answer
    Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R).
    Mark the correct choice as:
    Assertion [A]: A step-up transformer changes a low voltage into a high voltage.
    Reason (R): This violate the Law of conservation of energy.

    A) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]        

    B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]

    C) Assertion [A] is true but Reason (R) is false

    D) Assertion [A] is false and Reason (R) is also false

    Correct Answer: C

    Solution :

    (c) A step up transformer changes a low voltage into a high voltage. This does not violate the law of conservation of energy, because the current is reduced by the same proportion.


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