A long straight wire is carrying current $I_1$ in $+z$ direction. The $x-y$ plane contains a closed circular loop carrying current $I_2$ and not encircling the straight wire. The force on the loop will be:
  • A${\mu _0}{I_1}{I_2}/2\pi$
  • B${\mu _0}{I_1}{I_2}/4\pi$
  • C$0$
  • D
    depends on the distance of the centre of the loop from the wire.
Medium
art

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