TS EAMCET · Physics · Mechanical Properties of Fluids
The surface tension of soap solution is \(0.03 \mathrm{~N} / \mathrm{m}\). The work done in blowing to form a soap bubble of surface area \(40 \mathrm{~cm}^2\), (in J), is
- A \(1.2 \times 10^{-4}\)
- B \(2.4 \times 10^{-4}\)
- C \(12 \times 10^{-4}\)
- D \(24 \times 10^{-4}\)
Answer & Solution
Correct Answer
(B) \(2.4 \times 10^{-4}\)
Step-by-step Solution
Detailed explanation
In case of soap bubble \[ \begin{aligned} W & =T \times 2 \times \Delta A \\ & =0.03 \times 2 \times 40 \times 10^{-4} \\ & =2.4 \times 10^{-4} \mathrm{~J} \end{aligned} \]
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
- Consider a wire of length \(L\) with a resistance of \(5 \Omega\). Applying an external force, the wire is elongated such that its length becomes \(3 L\). Assuming, the resistivity and density of the material is unchanged, the resistance of the elongated wire isTS EAMCET 2021 Easy
- A body starts from rest with uniform acceleration. If its velocity after \(\mathrm{n}^{\text {th }}\) second (last second) is ' \(\mathrm{V}\) ' then its displacement in the last two seconds isTS EAMCET 2023 Medium
- The horizontal and vertical displacements of a projectile at time \(t\) are \(x=36 t\) and \(y=48 t-4.9 t^2\), respectively. Initial velocity of the projectile in \(\mathrm{m} / \mathrm{s}\) isTS EAMCET 2002 Medium
- A block of mass \(4 m\) travelling at a velocity \(v_1\) in \(x\)-direction on a frictionless horizontal plane makes a head-on collision with another block of mass \(2 m\) travelling in opposite direction with a velocity \(v_2\). After collision, both the blocks travel as a single block along \(x\)-direction with a final velocity \(5 v_2\). The ratio of velocities \(\frac{v_1}{v_2}\) isTS EAMCET 2018 Easy
- A bullet is fired at time \(t=0\) with velocity \(20 \mathrm{~m} / \mathrm{s}\) and at an initial angle of \(30^{\circ}\) with the horizontal. The an angle between the displacement vector and the horizontal after time \(0.1 \mathrm{~s}\) is (Assume \(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2\) )TS EAMCET 2022 Medium
- Two identical wires have a fundamental frequency \(f_0\) when kept under the same tension \(T\). If the tension of one wire is increased by \(\Delta T\), then the \(N\) beats occur when both wires oscillate simultaneously.TS EAMCET 2021 Medium
More PYQs from TS EAMCET
- A bullet of mass \(25 \mathrm{~g}\) moves horizontally at a speed of \(250 \mathrm{~m} / \mathrm{s}\) is fired into a wooden block of mass \(1 \mathrm{~kg}\) suspended by a long string. The bullet crosses the block and emerges on the other side. If the centre of the mass of the block rises through a height of \(20 \mathrm{~cm}\). The speed of the bullet as it emerges from the block is (take, \(g=10 \mathrm{~m} / \mathrm{s}^2\) )TS EAMCET 2020 Medium
- A man walking along a straight line with a velocity \(6 \mathrm{~km} / \mathrm{h}\) encounters rain falling vertically down with a velocity \(6 \sqrt{3} \mathrm{~km} / \mathrm{h}\). At what angle the man should hold his umbrella so that he can protect himself from rainTS EAMCET 2022 Easy
- The efficiency of a bulb of power 60 W is \(16 \%\). The peak value of the electric field produced by the electromagnetic radiation from the bulb at a distance of 2 m from the bulb is \(\left(\frac{1}{4 \pi \epsilon_0}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right)\)TS EAMCET 2024 Hard
- As shown in the figure, a uniform straight wire of length \(30 \sqrt{3} \mathrm{~cm}\) is bent in the form of an equilateral triangle ABC. A uniform magnetic field 2 T is applied parallel to the side BC. If the current through the wire is 2 A, the magnitude of the force on the side AC is
( \(\overline{\mathrm{B}}\) represents the direction of the magnetic field)
TS EAMCET 2025 Medium - Consider a particle is moving with a minimum speed \(v\) at highest point of vertical circle of radius \(R\). If the radius of the circle doubled the corresponding minimum speed will beTS EAMCET 2020 Easy
- A wooden cube of side 10 cm floats at the interface between water and oil with its lower surface 3 cm below the interface. If the density of oil is \(0.9 \mathrm{~g} \mathrm{~cm}^{-3}\), the mass of the wooden cube isTS EAMCET 2024 Easy