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. For non-conductors, the energy gap is
2. If the unit of force and length are doubled, then unit of energy will be
3. Dimensional formula of magnetic field in terms of mass M, length L
4. The dimensions of latent heat are
5. What is the time taken by moon light to reach earth?

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

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