MHT CET · Physics · Mechanical Properties of Fluids
The work done in blowing a soap bubble of radius \(R\) is \(W_1\) and that of radius \(2 R\) is \(W_2\). The ratio of \(W_1\) to \(W_2\) is
- A 1:4
- B 4:1
- C 2:1
- D 1:2
Answer & Solution
Correct Answer
(A) 1:4
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & W_1=2\left[4 \pi r^2 T\right] \\ & W_2=2\left[4 \pi(2 r)^2 T\right] \\ & \Rightarrow \frac{W_1}{W_2}=\frac{1}{4}\end{aligned}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The moment of inertia of a thin uniform rod of length \(L\) and mass \(M\) about an axis passing through a point at a distance of \(1 / 3\) from one of its ends and perpendicular to the rod isMHT CET 2010 Easy
- A solid sphere of mass 'M' and radius 'R' has moment of inertia 'l' about its diameter. It is recast into a disc of thickness 't' whose moment of inertia about an axis passing through its edge and perpendicular to its plane, remains 'I'. Radius of the disc will beMHT CET 2020 Medium
- The current (I) drawn from the battery in the given circuit is
MHT CET 2025 Medium - A body starts from rest from a distance \(\mathrm{R}_0\) from the centre of the earth. The velocity acquired by the body when it reaches the surface of the earth will be \((\mathrm{R}=\) radius of earth, \(\mathrm{M}=\) mass of earth \()\)MHT CET 2024 Medium
- A long solenoid carrying a current produces magnetic field B along its axis. If the number of turns per cm are tripled and the current is made \(\left(\frac{1}{4}\right)^{\mathrm{th}}\) then the new value of magnetic field will beMHT CET 2024 Easy
- Rate of radiation by a black body is 'R' at temperature 'T'. Another body has same area but emissivity is 0.2 and temperature 3 T . Its rate of radiation isMHT CET 2024 Easy
More PYQs from MHT CET
- Which of the following is a functional isomer of pentan-2-ol?MHT CET 2020 Easy
- Two progressive waves \(\mathrm{Y}_{1}=\sin 2 \pi\left(\frac{\mathrm{t}}{0 \cdot 4}-\frac{\mathrm{x}}{4}\right)\) and \(\mathrm{Y}_{2}=\sin 2 \pi\left(\frac{\mathrm{t}}{0 \cdot 4}+\frac{\mathrm{x}}{4}\right)\) superpose to form a standing wave. \(\mathrm{x}, \mathrm{Y}_{1}\) and \(\mathrm{Y}_{2}\) are in SI system. Amplitude of the particle at \(\mathrm{x}=0.5 \mathrm{~m}\) is \(\left[\sin 45^{\circ}=\cos 45^{\circ}=\frac{1}{\sqrt{2}}\right]\)MHT CET 2020 Medium
- Which among the following polymers has high tensile strength and is used to obtain tyre cords?MHT CET 2022 Easy
- The heat of combustion of carbon is \(-393.5 \mathrm{~kJ} / \mathrm{mol}\). The heat released upon the formation of \(35.2 \mathrm{~g}\) of \(\mathrm{CO}_{2}\) from carbon and oxygen gas isMHT CET 2011 Hard
- Which of the following statements is true? ( \(\Delta \mathrm{U}=\) increase in internal energy, \(\mathrm{dW}=\) work done by the system)MHT CET 2021 Easy
- The displacement of a wave is given by \(y=0 \cdot 002 \sin (100 t+x)\) where ' \(x\) 'and ' \(y\) ' are in metre and ' \(t\) ' is in second. This represents a waveMHT CET 2024 Easy