CUET · PHYSICS · PYQ PAPER 2025
A circular coil of 100 turns and area of cross-section \( 10^{-2} \text{ m}^2 \) is rotated about its vertical diameter at 60 rpm in a uniform horizontal magnetic field of \( 3.5 \times 10^{-2} \text{ T} \). The maximum emf induced in the coil is:
- A 2.1 V
- B 13.3 V
- C 0.22 V
- D 0.37 V
Answer & Solution
Correct Answer
(C) 0.22 V
Step-by-step Solution
Detailed explanation
\( \omega = 2\pi f = 2\pi (60/60) = 2\pi \text{ rad/s} \) \( \mathcal{E}_{max} = NAB\omega \) \( \mathcal{E}_{max} = (100)(10^{-2})(3.5 \times 10^{-2})(2\pi) \) \( \mathcal{E}_{max} \approx 0.22 \text{ V} \)
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