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The self induced e.m.f. in a 0.1 H coil when the current in it is changing at the rate of 200 amp/sec is
Options
(a) 8×10⁻⁴ V
(b) 8×10⁻⁵ V
(c) 20 V
(d) 125 V
Correct Answer:
20 V
Explanation:
e = – L (dI / dt), Magnitude of e = L (dI / dt) = 0.1 × 200 = 20 V
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two thin long conductors seprated by a distance d carry currents
- A step-up transformer operates on a 230 V line and supplies a current of 2 A.
- If oxygen has root mean square velocity of C m/s, then root mean square velocity of H
- The half life of a radioactive isotope ‘X’ is 20 years. It decays to another element Y
- The magnetic susceptibility of a material of a rod is 299. Permeability of vacuum
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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