A circular conducting loop of radius $R$ carries a current $I.$ Another straight infinite conductor carrying current $I$ passes through the diameter of this loop as shown in the figure. The magnitude of force exerted by the straight conductor on the loop is
  • A$\pi \mu_0 I^2$
  • B$\mu_0 I^2$
  • C$\frac{ \mu_0 I^2}{2\pi}$
  • D$\frac{ \mu_0 I^2}{\pi}$
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