A current-carrying coil is placed in a uniform magnetic field. In stable equilibrium, how will the plane of the coil orient relative to the field?
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A current-carrying coil is placed in a uniform magnetic field. In stable equilibrium, how will the plane of the coil orient relative to the field?

G1 Physics · Accepted Answer

Step 1: Magnetic torque on a current loop is τ⃗=μ⃗×B⃗, with μ⃗ perpendicular to loop plane. Step 2: At stable equilibrium torque is zero with magnetic moment aligned to B. Step 3: Consequently the plane of the current loop is perpendicular to magnetic field. Option D. Final answer: (D) Perpendicular to the magnetic field.