A disc of radius 0.1 m is rotating with a frequency 10 rev/sec in a normal magnetic

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A disc of radius 0.1 m is rotating with a frequency 10 rev/sec in a normal magnetic field of strength 0.1 tesla. Net induced emf is

Options

(a) 2 π x 10⁻² V
(b) 4 π x 10⁻² V
(c) π x 10⁻² V
(d) 3 π x 10⁻² V

Correct Answer:

π x 10⁻² V

Explanation:

Induced emf = Baʋ

= 0.1 × π (0.1)² × 10

= 0.1 × 0.1π × 10

= π × 10⁻³ × 10

= π × 10⁻² V

Related Questions:

1. In a given process on an ideal gas, dW=0 and dQ<0. Then for the gas
2. A copper disc of radius 0.1 m is rotated about its centre, with 10 revolutions
3. Identify the paramagnetic substance
4. what is the de-Broglie wavelength of the electron accelerated through a potential
5. Order of e/m ratio of proton, α-particle and electron is

Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)

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