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I know that if a wire is carrying current, the force is F= iBl sinc

But what if the wire does not have current, and rather the magnetic field around it varies. Will there still be a force? If so, what will be it's magnitude.

You may consider magnetic field direction as required to get a value of force if possible.

Note: This is not repeated question. Other similar questions are regarding wires carrying current. Mine is for wires with no current.

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  • $\begingroup$ You gave the answer yourself: if I=0 the force is 0 no matter which direction B $\endgroup$
    – trula
    Commented Sep 5, 2023 at 17:18
  • $\begingroup$ @trula But does variation of B cause a force? That is my question. $\endgroup$
    – Mohammed Hamza
    Commented Sep 5, 2023 at 17:19
  • $\begingroup$ No, not in a straight wire, The area B goes through has to change. $\endgroup$
    – trula
    Commented Sep 5, 2023 at 17:59
  • $\begingroup$ Just as I said.:no force $\endgroup$
    – trula
    Commented Sep 5, 2023 at 19:57

1 Answer 1

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If there is no current there is no force. However, a changing magnetic field will induce a current (causing there to be a force) in the wire if allowed.

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  • $\begingroup$ What current and do you mean with "if allowed" $\endgroup$
    – trula
    Commented Sep 7, 2023 at 14:34

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