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Assertion :no electric current will be present within a region having uniform and constant magnetic field. Reason: Within a region of uniform and constant magnetic field B, the path integral of magnetic field Bdl along any closed path is zero. Hence, from Ampere circuital law Bdl=μ0I (where the given terms have usual meaning), no current can be present within a region having a uniform and constant magnetic field

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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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
Both Assertion and reason are true but reason is not the correct explanation for assertion.
Because whenever there is changing magnetic field, emf is produced i.e. by the process of electromagnetic Induction i.e. current is generated. But when the magnetic field is uniform and constant there is no production of emf i.e. no current.

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