Assertion :Magnetic force is always perpendicular to the magnetic field. Reason: Electric force 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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Both Assertion and Reason are incorrect.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
Magnetic force is given by $\to F = i (\to l \times \to B)$ for a current carrying conductor and for a moving charge $\to F = q (\to v \times \to B)$ .
Electric force is given by $\to F = q \to E$
but for negative charge $\to F = - q \to E$ , hence in this case force will not be along the direction of electric field rather it would be along opposite to the direction of electric field.
Thus, it is clear that assertion is correct but reason is incorrect.

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