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Question

3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of 30 with the direction of the field. It experiences a force of magnitude

A
3×104 N.
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B
3×102 N.
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C
3×102 N.
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D
3×104 N.
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Solution

The correct option is C 3×102 N.
By using F=Bil sinθF=(500×104)×3×0.4×sin 30=3×102 N.

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