Assertion :Magnetic force on a moving charge is always perpendicular to the magnetic field. Reason: Electric force on a charge is along the direction of electric field.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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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
Magnetic force, $_{m} = q (\to v \times \to B)$
Electric force , $_{e} = q \to E$
Hence, both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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