| ⇦ | 
| ⇨ |
A proton carrying 1 MeV kinetic energy is moving in a circular path of radius R in uniform magnetic field. What should be the energy of an α-particle to describe a circle of same radius in the same field?
Options
(a) 2 MeV
(b) 1 MeV
(c) 0.5 MeV
(d) 4 MeV
Correct Answer:
1 MeV
Explanation:
According to the principal of circular motion in a magnetic field
Fc = Fm ⇒ mv²/R = qvB
⇒ R = mv/qB = P/qB = √2m.k/qB
Rα = √2(4m)K’/2qB
R/Rα =√ K/K’
but R =Rα (given) Thus K=K’=1 MeV
Related Questions: - A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by
- A ray of light is incident on a transparent glass slab of refractive index 1.62
- A body is moving in a vertical circle. The string must remain taut at the highest point
- In a nuclear reactor, the number of U²³⁵ nuclei undergoing fissions per second
- Given A=4i+6j and B=2i+3j. Which of the following is correct?
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by
- A ray of light is incident on a transparent glass slab of refractive index 1.62
- A body is moving in a vertical circle. The string must remain taut at the highest point
- In a nuclear reactor, the number of U²³⁵ nuclei undergoing fissions per second
- Given A=4i+6j and B=2i+3j. Which of the following is correct?
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