| ⇦ | 
| ⇨ |
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: - Two cities are 150 km apart. Electric power is sent from one city to another city
- The drift speed of electrons in copper wire of diameter and length l is v.
- The dimensional formula of Plancks’s constant and angular momentum are
- Two spheres A and B of masses m and m respectively collide. A is at rest initially
- In a transistor the collector current is always less than the emitter current
Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two cities are 150 km apart. Electric power is sent from one city to another city
- The drift speed of electrons in copper wire of diameter and length l is v.
- The dimensional formula of Plancks’s constant and angular momentum are
- Two spheres A and B of masses m and m respectively collide. A is at rest initially
- In a transistor the collector current is always less than the emitter current
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