A planar coil having 15 turns carries 20 A current. The coil is oriented with respect to the uniform magnetic field $\mathbf{B} = 0.5 \hat{\mathbf{i}}$ T such that its directed area is $\mathbf{A} = -0.04 \hat{\mathbf{i}} {\text{m}}^2$. The potential energy of the coil in the given orientation is