$A$ square loop of side $l$ is placed in the neighbourhood of an infinitely long straight wire carrying a current $I_1$. The loop carries a current $I_2$ as shown in the figure.

• A
  The magnetic moment of the loop is $\vec{P}_m = l^2 I_2 \hat{k}$
• B
  The magnetic moment of the loop is $\vec{P}_m = l^2 I_1 \hat{k}$
• C
  The potential energy of the loop is minimum
• D
  The torque experienced by the loop is maximum