12th Class Physics Magnetic Effects of Current / करंट का चुंबकीय प्रभाव Question Bank Case Based (MCQs) - Magnetism and Matter

  • question_answer
    Earth's magnetic field may increase if:

    A) it rotates on its axis faster.

    B) its direction of rotation is changed.

    C) it revolves round the Sun faster.

    D) All of the above           

    Correct Answer: A

    Solution :

    Option [a] is correct. Explanation: If the Earth rotated faster, it would have a stronger magnetic field.


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