12th Class Physics Magnetism Question Bank Assertion And Reason (MCQs) - Moving Charges and Magnetism

  • question_answer
    Assertion (A): Galvanometer to ammeter conversion takes place by connecting a low value resistance in parallel with it.
    Reason (R): The low value resistance increases the effective resistance and protects the galvanometer.

    A) Both A and R are true and R is the correct explanation of A

    B) Both A and R are true but R is NOT the correct explanation of A

    C) A is true but R is false

    D) A is false and R is true

    Correct Answer: C

    Solution :

    Option [c] is correct
    Explanation:  Galvanometer to ammeter conversion takes place by connecting a low value resistance known as "shunt" in parallel with it. The assertion is true.
    When two resistors are connected in parallel then the effective resistance becomes lower than the lowest value of the two resistors.
    Hence the reason is false.


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