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Asked by Tarwar Last Modified
When the flexible wire of irregular shape is placed in a region with a magnetic field directed normal to the plane of the loop and away from the reader, the magnetic flux through the loop changes.
According to Faraday's law of electromagnetic induction, a changing magnetic flux through a loop induces an electromotive force (emf) and consequently an induced current in the loop.
In this case, as the wire turns into a circular shape, the area of the loop enclosed by the wire increases. This increase in the area of the loop results in a change in the magnetic flux passing through the loop.
To oppose the increase in magnetic flux caused by the expansion of the loop, the induced current will flow in such a way that it generates a magnetic field opposing the external magnetic field.
Using the right-hand rule for the direction of induced current, if we imagine the magnetic field lines pointing away from us (as mentioned in the question), the induced current will flow in a clockwise direction in the circular loop. This is because the induced current will generate a magnetic field that opposes the external magnetic field, thereby resisting the increase in magnetic flux through the loop.
Therefore, the direction of the induced current in the wire will be clockwise in the circular loop.
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