Practice question

Given: A dipole with m = 0.35 A m² in B = 0.9 T at 30° has torque: These values define the system as per NCERT data. Formula: tau = m B sinθ. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Given: m = 0.35 A m², B = 0.9 T, θ = 30°, sin 30° = 0.5 . tau = 0.35 × 0.9 × 0.5 = 0.1575 N m . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.