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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
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Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Three solids of masses m₁,m₂ and m₃ are connected with weightless string
- A transformer rated at 10 kW is used to connect a 5 kV transmission line to a 240 V
- The resistance of a wire is 5 ohm at 50° C and 6 ohm at 100° C. The resistance
- For CE transistor amplifier, the audio signal voltage across the collector resistance
- Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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