TS EAMCET · Physics · Electromagnetic Induction
A copper disc of radius \(0.1 \mathrm{~m}\) rotates about an axis passing through its centre and perpendicular to its plane with 10 revolutions per second in a uniform transverse magnetic field of \(0.1 \mathrm{~T}\). The emf induced across the radius of the disc is
- A \(\frac{\pi}{10} \mathrm{~V}\)
- B \(\frac{2 \pi}{10} \mathrm{~V}\)
- C \(10 \pi \mathrm{mV}\)
- D \(20 \pi \mathrm{mV}\)
Answer & Solution
Correct Answer
(C) \(10 \pi \mathrm{mV}\)
Step-by-step Solution
Detailed explanation
Consider a small radial segment of \(\mathrm{dx}\) at a distance from the centre of the disc. Velocity of this segment, \(\mathrm{v}=\omega \mathrm{x}\) emf induced across this segment…
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