Magnetic Effects Of Current Question 224

Question: There long straight wires A, B and C are carrying current as shown figure. Then the resultant force on B is directed ….. [KCET 2004]

Options:

A) Towards A

B) Towards C

C) Perpendicular to the plane of paper and outward

D) Perpendicular to the plane of paper and inward

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Answer:

Correct Answer: B

Solution:

$ F\propto i_{1}i_{2} $ , so force on B due to C will be greater than that due A. Hence net force on B acts towards C.