NEET2017Physics-Magnetism
NEET 2017 Physics Torque on a Current Loop MCQ Question
Type: MCQ-numerical-Medium-Class 12
A⁵⁰⁻turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 μA and subjected to magnetic field of strength 0.85 T. Work done for rotating the coil by 180° against the torque is
A
9.1 μJ
B
4.55 μJ
C
2.3 μJ
D
1.15 μJ
Correct Answer
Option B
Detailed Explanation
The work done is calculated using the formula W = τθ, where τ is the torque and θ is the angle of rotation in radians.
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