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The current through an inductor changes from 3 A to 2 A is 1 m/s. If induced e.m.f. in inductor is 5V then L is
Options
(a) 5×10⁻² H
(b) 5×10⁻³ H
(c) 2.5×10⁻³ H
(d) None of these
Correct Answer:
5×10⁻³ H
Explanation:
– L (di / dt) = ε ⇒ L × [(3A – 2A) / (i × 10⁻³s)] = 5 V
Therefore, L = 5 × 10⁻³ H
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The voltage of clouds is 4×10⁶ volt with respect to ground. In a lightening
- A tuning fork A produces 4 beats per second with another tuning fork B of frequency
- In a n-p-n transistor about 10¹⁰ electrons enter the emitter in 2 μs,
- A body of mass M hits normally a rigid wall with velocity V and bounces back
- Pure Si at 500 K has equal number of electron (nₑ) and hole (nₕ) concentrations
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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