A metal sheet is placed in a magnetic field t | vedclass

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(A) According to Lenz's law,the direction of the induced eddy current is such that it opposes the change in the magnetic flux that produces it.Given t

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Perpendicular to the plane of the paper and inwards

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(A) According to Lenz's law,the direction of the induced eddy current is such that it opposes the change in the magnetic flux that produces it.Given that the magnetic field is increasing from zero to maximum,the magnetic flux through the metal sheet is increasing.To oppose this increase,the eddy current must create a magnetic field that points in the opposite direction to the external magnetic field.The figure shows the eddy currents flowing in a counter-clockwise direction.Using the right-hand thumb rule,a counter-clockwise current creates a magnetic field that points outwards,perpendicular to the plane of the paper.Since the eddy current's magnetic field opposes the external field,the external magnetic field must be pointing inwards,perpendicular to the plane of the paper.

$A$ metal sheet is placed in a magnetic field that changes from zero to maximum. If the figure shows the direction of eddy currents,then the direction of the magnetic field is:

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