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Question
Assertion :Self-induced eddy currents are responsible for the skin effect in conductors.It cannot be used for non-destructive testing of materials for geometry features, like micro-cracks. Reason: By Lenz's law, an eddy current creates a magnetic field that opposes the magnetic field that created it, and thus eddy currents react back on the source of the magnetic field.
Assertion :Self-induced eddy currents are responsible for the skin effect in conductors.It cannot be used for non-destructive testing of materials for geometry features, like micro-cracks. Reason: By Lenz's law, an eddy current creates a magnetic field that opposes the magnetic field that created it, and thus eddy currents react back on the source of the magnetic field.
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Skin effect is caused by eddy current due to which is flow in the conductor across the surface but if any crack is present then current flow through the surface where cracked. So small crack doesn't predict reason is also but not an explanation of assertion.
Skin effect is caused by eddy current due to which is flow in the conductor across the surface but if any crack is present then current flow through the surface where cracked. So small crack doesn't predict reason is also but not an explanation of assertion.
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