Radius of a soap bubble is increased from R to 2R. Work done in this process

⇦

⇨

Radius of a soap bubble is increased from R to 2R. Work done in this process in terms of surface tension S is

Options

(a) 24 πR²S
(b) 48 πR²S
(c) 12 πR²S
(d) 36 πR²S

Correct Answer:

24 πR²S

Explanation:

Work done = 2 x S x Change in surface area
W = 2 x S x 4π (R₂² – R₁²)
Given: R₂ = 2R, R₁ = R = 8S π (4R² – R²) = 24 πR²S.

Related Questions:

1. The current in the coil of inductance 5H decreases at the rate of 2 A/s
2. A parallel plate air capacitor of capacitance C is connected to a cell of emf
3. Electromagnetic induction is not used in
4. Application of a forward bias to a P-N junction
5. In a semiconductor

Topics: Properties of Bulk Matter (130)
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