The potential of a large liquid drop when eight liquid drops are combined is 20 V.

The Potential Of A Large Liquid Drop When Eight Liquid Physics Question

The potential of a large liquid drop when eight liquid drops are combined is 20 V. Then the potential of each single drop was

Options

(a) 10 V
(b) 7.5 V
(c) 5 V
(d) 2.5 V

Correct Answer:

5 V

Explanation:

Volume of 8 drops = Volume of bigger drop
or, [(4/3) πr³] × 8 = (4/3) πR³ or 2r = R ——(i)
Charge is conserved. 8q = Q
.·. V’ = q / capacity = q / 4πε₀r
V = Q / capacity = Q / 4πε₀R
Then , V’ / V = (q / Q) × (R / r) or, V’ / 20 = (q / 8q) × (2r / r) = 1 / 4
or, V’ = 5 volt.

Related Questions:

  1. An LED is constructed from a p-n junction based on a certain semi-conducting
  2. The rest energy of an electron is
  3. A geostationary satellite is orbiting the earth at a height of 5R above that surface
  4. A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰
  5. A charged particle enters a uniform magnetic field with a certain speed at right angles

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*