| ⇦ | 
| ⇨ |
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: - The self-inductance of a choke coil is 10 mH. When it is connected with a 10 V DC source,
- The distance of the closest approach of an alpha particle fired at a nucleus
- A Si and a Ge diode has identical physical dimensions. The bandgap in Si is larger
- An open pipe resonates with a tuning fork of frequency 500 Hz. It is observed
- To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The self-inductance of a choke coil is 10 mH. When it is connected with a 10 V DC source,
- The distance of the closest approach of an alpha particle fired at a nucleus
- A Si and a Ge diode has identical physical dimensions. The bandgap in Si is larger
- An open pipe resonates with a tuning fork of frequency 500 Hz. It is observed
- To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA
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