Practice question

Given: A dipole with m = 0.5 A m² in B = 0.7 T at 60° 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 = 0.5 A m², B = 0.7 T, θ = 60°, sin 60° = fracsqrt32 approx 0.866 . tau = 0.5 × 0.7 × 0.866 approx 0.3031 N m approx 0.30 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.