JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Critical Thinking

  • question_answer
    A conducting ring is placed around the core of an electromagnet as shown in fig. When key K is pressed, the ring

    A)             Remain stationary

    B)             Is attracted towards the electromagnet

    C)             Jumps out of the core

    D)             None of the above

    Correct Answer: C

    Solution :

                When key k is pressed, current through the electromagnet start increasing i.e. flux linked with ring increases which produces repulsion effect.


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