일반물리학 2 — Magnetic Fields: Problem 49

49 The coil in Fig. 28-39 carries current \( i = 4.60 \text{ A} \) in the direction indicated, is parallel to an \( xz \) plane, has \( 3.00 \) turns and an area of \( 4.00 \times 10^{-3} \text{ m}^2 \), and lies in a uniform magnetic field \( \vec{B} = (3.00\hat{i} - 3.00\hat{j} - 4.00\hat{k}) \text{ mT} \). What are (a) the orientation energy of the coil in the magnetic field and (b) the torque (in unit-vector notation) on the coil due to the magnetic field?