CUET · PHYSICS · PYQ PAPER 2025
A closely wound coil of 50 turns and radius 15 cm carries a current of 3 A. The magnetic moment of the coil is:
- A \( 33.76 \, \text{A}\cdot\text{m}^2 \)
- B \( 32.75 \, \text{A}\cdot\text{m}^2 \)
- C \( 10.59 \, \text{A}\cdot\text{m}^2 \)
- D \( 1.59 \, \text{A}\cdot\text{m}^2 \)
Answer & Solution
Correct Answer
(C) \( 10.59 \, \text{A}\cdot\text{m}^2 \)
Step-by-step Solution
Detailed explanation
\( \mu = N I \pi r^2 = 50 \times 3 \, \text{A} \times \pi (0.15 \, \text{m})^2 \approx 10.60 \, \text{A}\cdot\text{m}^2 \)
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