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Current $'i'$ is flowing in the rectangular loop placed in the $xyz$ plane as shown in the figure. Find the magnetic moment of the loop
  • A$i(ab)\hat k$
  • B$iab(\cos 30\hat i + \sin 30\hat k)$
  • C$i\,ab(\sin 30\hat i + \cos 30\hat k)$
  • D$i\,ab(\sin 30\hat i + \cos 30\hat j)$
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