A loop PQR carries a current i = 2   A as shown in the figure. A uniform magnetic field B = 2  T exists in space parallel to the plane of the loop. The magnetic torque on the loop is

Step-by-step solution

Given, i = 2   A , B = 2  T Area of the loop is A = 1 2 × B a s e × H e i g h t = 2   m 2 τ = i A B sin ⁡ θ [Here, θ = 90 ° ] τ = 2 × 2 × 2 × sin ⁡ 90 ° = 2   N   m