| ⇦ | 
| ⇨ |
The potential energy of particle in a force field is U = A/r² – b/r, where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is:
Options
(a) B / 2A
(b) 2A / B
(c) A / B
(d) B / A
Correct Answer:
2A / B
Explanation:
for equilibrium dU/ dr = 0
-2A/r³ + B/r² = 0 r = 2A / B
for stable equilibrium d²U /dr² should be positive for the value of r.
here d²U / dr² = 6A/r⁴ – 2B/r³ is +ve value for r = 2A / B So.
Related Questions: - If an electron and a proton have the same de-Broglie wavelength, then the kinetic
- The resistance of a bulb filament is 100 Ω at a temperature of 100⁰C.
- A lead bullet of 10 gm travelling at 300 m/s strikes against a block
- When two small bubbles join to form a bigger one, energy is
- In a transistor, the value of βis 100, then the value of α will be
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If an electron and a proton have the same de-Broglie wavelength, then the kinetic
- The resistance of a bulb filament is 100 Ω at a temperature of 100⁰C.
- A lead bullet of 10 gm travelling at 300 m/s strikes against a block
- When two small bubbles join to form a bigger one, energy is
- In a transistor, the value of βis 100, then the value of α will be
Topics: Electrostatics (146)
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