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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 


Your Answer
A
 3×104 N.
Your Answer
B
 3×102 N.
Correct Answer
C
 3×102 N.
Your Answer
D
 3×104 N.

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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