CUET · PHYSICS · PYQ PAPER 2025
A rectangular coil of sides 2 cm and 5 cm having 2000 turns and carrying a current of 200 mA is placed in a uniform magnetic field of 5.0 T directed along positive X-axis. The maximum torque experienced by the coil is
- A 2 N m
- B 4 N m
- C 2 N m
- D 4 N m
Answer & Solution
Correct Answer
(C) 2 N m
Step-by-step Solution
Detailed explanation
\(A = 0.02 \text{ m} \times 0.05 \text{ m} = 0.001 \text{ m}^2\) \(\tau_{max} = N I A B = 2000 \times 0.2 \text{ A} \times 0.001 \text{ m}^2 \times 5.0 \text{ T} = 2 \text{ N m}\)
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