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Physics
The magnetic moment of a current carrying loop carrying current I as shown in figure, is
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Q. The magnetic moment of a current carrying loop carrying current I as shown in figure, is
A
$\sqrt {2} la^2 hat{k}$
B
$la^2 hat{k}$
C
$\frac {la^2}{\sqrt{2}}\hat k$
D
$2la^2 hat {k}$
Solution:
$\overrightarrow{M} = i \overrightarrow{A} = ia^{2}\hat{k}$
