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The induced emf in a coil of 10 H inductance in which current varies from 9 A to 4 A in 0.2 s is
Options
(a) 200 V
(b) 250 V
(c) 300 V
(d) 350 V
Correct Answer:
250 V
Explanation:
Induced emf, e = -L (di / dt)
Given, L = 10 H, Δi = 9 – 4 = 5 A,
dt = 0.2 s
emf, e = 10 × (5 / 0.2) = 250 V
Related Questions: - Three unequal resistors in parallel are equivalent to a resistance 1 Ω.
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
- A body covers 200 cm in the first 2 seconds and 220 cm in the next 4 seconds.
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Three unequal resistors in parallel are equivalent to a resistance 1 Ω.
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
- A body covers 200 cm in the first 2 seconds and 220 cm in the next 4 seconds.
- Two particles are oscillating along the same line with the same frequency
- The ratio of radii of planets A and B is K₁ and ratio of accelerations
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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