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Q.

A wire carrying a current I along the positive x-axis has length L. It is kept in a magnetic field B→=(2i^+3j^-4k^) T. The magnitude of the magnetic force acting on the wire is 

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a

5 IL

b

3IL

c

5 IL

d

3 IL

answer is D.

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Detailed Solution

detailed_solution_thumbnail

Force acting on the current-carrying wire is given by
F→=IL×B→=IL(i^)×(2i^+3j^−4k^)F→=IL[3k^+4j^]⇒|F→|=5IL

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