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    The current in the loop is induced by a changing magnetic field. Is it increasing or decreasing?

    I think it is decreasing, but I can't really explain why.
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    (Original post by PatchworkTeapot)


    The current in the loop is induced by a changing magnetic field. Is it increasing or decreasing?

    I think it is decreasing, but I can't really explain why.
    Because the question does not state whether the current is increasing or decreasing, we cannot determine whether the magnetic field is increasing or decreasing.
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    You are right. The magnetic field is decreasing. The evidence: the direction of the current in the loop.The induced field acts in the direction of the applied field to try to keep it constant.
    That's because of the Lenz' s law, as you said.
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    Lenz's law is that the induced current is in such a direction as to negate the change in magnetic flux.
    Work out the direction of the field produced by the current. This will be in the opposite direction to the change of flux.
 
 
 
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