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Q.

Same current i=2A is flowing in a wire frame as shown in figure. The frame is a combination of two equilateral triangles ACD and CDE of side 1m . It is placed in uniform magnetic field B=4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is

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a

24N

b

16N

c

8N

d

Zero

answer is A.

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Detailed Solution

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   FCAD=FCD=FCED 

Net force on frame =3FCD
F=3(ilB)=(3)(2)(1)(4) =24N                          

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