Practice question

Given: A magnetic dipole of moment 0.6 A m² is in a uniform field of 0.4 T at 60° . What is the torque on it? These values define the system as per NCERT data. Formula: Torque is tau = m B sinθ. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Given: m = 0.6 A m², B = 0.4 T, θ = 60°, sin 60° = fracsqrt32 approx 0.866 . Substitute: tau = 0.6 × 0.4 × 0.866 approx 0.20784 N m approx 0.21 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.