A loop carrying current I lies in the x-y plane as shown in the figure. The unit vector ^k is coming out of the plane of the paper. The magnetic moment of the current loop is
a2I^k
(π2+1)a2I^k
−(π2+1)a2I^k
(2π+1)a2I^k
A
(2π+1)a2I^k
B
(π2+1)a2I^k
C
a2I^k
D
−(π2+1)a2I^k
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Solution
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Magnetic moment (M)=I.A=I×(2×π4a2+a2)=(π2+1)a2I^k
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