| ⇦ | 
| ⇨ |
Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the centre of the ring is
Options
(a) µ₀q f / 2 R
(b) µ₀q / 2 f R
(c) µ₀q / 2π f R
(d) µ₀q f / 2π R
Correct Answer:
µ₀q f / 2 R
Explanation:
When the ring rotates f Hz, the current flowing in the ring is i = q/T = qf
Magnetic field at the centre of the ring is
B = µ₀I / 2 R = µ₀q f / 2 R
Related Questions: - The electric and magnetic field assiciated with an E.M. wave
- Astigmatism is corrected by using
- Two point charge +9e and +e are at 16 cm away from each other.
- In the Davisson and Germer experiment, the velocity of electrons emitted from the
- The displacement of an object attached to a spring and executing simple harmonic
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The electric and magnetic field assiciated with an E.M. wave
- Astigmatism is corrected by using
- Two point charge +9e and +e are at 16 cm away from each other.
- In the Davisson and Germer experiment, the velocity of electrons emitted from the
- The displacement of an object attached to a spring and executing simple harmonic
Topics: Magnetic Effects of Current and Magnetism (167)
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
Leave a Reply