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

Options

A. 24 N
B. Zero
C. 16 N
D. 8 N

Answer

A

Explanation

`vecF_(CAD) = vecF_(CD) = vecF_(CED)`
`implies F_("net") = 3 vecF_(CD) = 3 (il B)`
`=3 xx 2 xx (1) xx 4 = 24 N`