Question
In the figure, AB is a long straight wire carrying a current of 20A and CDFG is a rectangular loop of size 20 cm x 9cm carrying a current of 10A. The edge CG is parallel to AB, at a distance of 1cm from it. The force exerted on the loop by the magnetic field of the wire is
Answer: Option C
:
C
F=μ0i1i2l2π[1r1−1r2]=2×10−7×20×10×0.2[110−2−110×10−2]=8×10−6×[910]×102=7.2×10−4N
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:
C
F=μ0i1i2l2π[1r1−1r2]=2×10−7×20×10×0.2[110−2−110×10−2]=8×10−6×[910]×102=7.2×10−4N
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