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

Question

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, 16 N m, 8 N m, zero, 4 N m

MARKS App · Accepted Answer

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

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