Practice question

Given: A rectangular loop of area 0.05 m² with 16 turns carries 2.2 A in a field of 0.7 T at 45° to the plane. What is the torque? These values define the system as per NCERT data. Formula: tau = N I A B sin θ, where θ = 45° to plane means sin 45° with normal. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: tau = 16 × 2.2 × 0.05 × 0.7 × sin 45° = 1.232 × 0.707 = 0.871 approx 0.87 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.