The induced emf in a coil of 10 H inductance in which current varies

⇦

⇨

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:

1. Steam at 100⁰C is passed into 20 g of water at 10°C. When water acquires a temperature
2. Coherent sources are those sources for which
3. When two small bubbles join to form a bigger one, energy is
4. A solid which is transparent to visible light and whose conductivity increases
5. If in an experiment for determination of velocity of sound by resonance tube

Topics: Electromagnetic Induction (76)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends