| ⇦ | 
| ⇨ |
The ratio of speed of an electron in ground state in Bohr’s first orbit of hydrogen atom to velocity of light in air (c ) is
Options
(a) e²/2ε₀hc
(b) 2e²ε₀/hc
(c) e³/2ε₀hc
(d) 2ε₀hc/e²
Correct Answer:
e²/2ε₀hc
Explanation:
Velocity of electron in nᵗʰ orbit = αcz / n
where α = (e²/4πε₀) [1 / c(h/π)] = e²/2ε₀hc
v / c = αz / n = (e² × 1) / 2ε₀hc × 1 = e²/2ε₀hc
Related Questions: - Which of the following will be σ if Y=2.4 η?
- A wire having resistance 12Ω is bent in the form of an equilateral triangle.
- A rod of 10 cm length is moving perpendicular to uniform magntic field of intensity
- A wave in a string has an amplitude of 2cm. The wave travels in the positive direction
- Two balls are dropped from heights h and 2h respectively. The ratio of times
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following will be σ if Y=2.4 η?
- A wire having resistance 12Ω is bent in the form of an equilateral triangle.
- A rod of 10 cm length is moving perpendicular to uniform magntic field of intensity
- A wave in a string has an amplitude of 2cm. The wave travels in the positive direction
- Two balls are dropped from heights h and 2h respectively. The ratio of times
Topics: Atoms and Nuclei (136)
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