Student Login

Home›Chapters›Surface Tension PYQs›Surface Energy & Work Done›Question 18

MHT CET 2023 (9 May, Shift 2) · Surface Energy & Work Done

Surface Energy & Work Done question from MHT CET 2023 (9 May, Shift 2)

Q18MHT CET 2023 · 9 MAY · SHIFT 2Medium

Surface Energy & Work Done

A soap bubble of radius ' $R$ ' is blown. After heating a solution, a second bubble of radius ' $2R$ ' is blown. The work required to blow the $2$ nd bubble in comparison to that required for the $1$ st bubble is

Show answer and solution

Answer: (c)

$W = 8\pi R^2 T$ ; doubling $R$ at the same $T$ would give 4 times the work.
Surface tension decreases on heating, so $T' < T$ .
So $W_2$ is slightly less than $4W_1$ : the answer is (c).

Report a mistake

More questions on Surface Energy & Work Done

The amount of energy required to form a soap bubble of radius 2 cm from a soap is nearly…NEET 2023
Surface tension of a soap bubble is 2.0 × 10⁻² N m⁻¹. Work done to increase the radius of…JEE Main 2023 (29 Jan, Shift 1)
The surface tension of soap is 3.5 × 10⁻² N m⁻¹. The amount of work done required to…JEE Main 2023 (11 Apr, Shift 2)
A film of soap is formed between two straight parallel wires of length 10 cm each…MHT CET 2023 (9 May, Shift 2)
The work done in blowing a soap bubble of radius R is ' W₁ ' at room temperature. Now the…MHT CET 2022 (11 Aug, Shift 2)
Work done in increasing the size of a soap bubble from radius of 3 cm to 5 cm in…MHT CET 2021 (23 Sep, Shift 1)
If the work done in blowing a soap bubble of volume ' V ' is ' W ', then the work done in…MHT CET 2021 (24 Sep, Shift 2)
The work done in blowing a soap bubble of volume ' V ' is ' W '. The work required to…MHT CET 2021 (24 Sep, Shift 1)