TS EAMCET · Physics · Mechanical Properties of Fluids
A thin film of water is formed between two straight parallel wires each of length 8 cm separated by distance of 0.6 cm. The work done to increase the distance between the wires to 0.8 cm is
(Surface tension of water \(=0.07 \mathrm{Nm}^{-1}\) )
- A \(33.6 \mu \mathrm{~J}\)
- B \(22.4 \mu \mathrm{~J}\)
- C \(11.2 \mu \mathrm{~J}\)
- D \(44.8 \mu \mathrm{~J}\)
Answer & Solution
Correct Answer
(B) \(22.4 \mu \mathrm{~J}\)
Step-by-step Solution
Detailed explanation
\(W = T \cdot \Delta A\) \(\Delta A = 2 L (x_2 - x_1) = 2(0.08 \text{ m})(0.008 \text{ m} - 0.006 \text{ m})\) \(\Delta A = 2(0.08 \text{ m})(0.002 \text{ m}) = 0.00032 \text{ m}^2\) \(W = (0.07 \text{ Nm}^{-1})(0.00032 \text{ m}^2) = 0.0000224 \text{ J}\)…
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
- Choose the correct statement.TS EAMCET 2020 Easy
- The amplitude of a damped oscillator varies with time as \(\mathrm{A}(\mathrm{t})=\mathrm{A}_{\mathrm{o}} \exp (-\mathrm{bt} / 2 \mathrm{~m})\) where \(\mathrm{b}=70 \mathrm{~g} / \mathrm{s}\) and \(\mathrm{m}=200 \mathrm{~g}\). How long does it take for the mechanical energy to drop to one - fourth of its initial value? \([\) Take \(\ln 2=0.7]\)TS EAMCET 2022 Medium
- A generator produces a current of \(100 \mathrm{~A}\) at \(4000 \mathrm{~V}\). The voltage is stepped up to \(2 \times 10^5 \mathrm{~V}\) by a transformer before being sent on a high voltage transmission line of resistance \(50 \Omega\). The percentage of power loss in the transmission line isTS EAMCET 2022 Easy
- According to Moseley's law, the frequency ( \(v)\) of the \(K_\alpha\) line and the atomic number \(Z\) of the element have the relation \((A\) and \(B\) are constants)TS EAMCET 2005 Easy
- A solid sphere and a thin uniform circular disc of same radius are rolling down an inclined plane without slipping. If the acceleration of the sphere is \(3 \mathrm{~ms}^{-2}\), then the acceleration of the disc isTS EAMCET 2025 Medium
- A \(4 \mu \mathrm{F}\) capacitor is charged by a \(200 \mathrm{~V}\) battery. It is then disconnected from the supply and is connected to another uncharged \(2 \mu \mathrm{F}\) capacitor. During the process, loss of energy (in \(\mathrm{J}\) ) isTS EAMCET 2005 Medium
More PYQs from TS EAMCET
- If a brass sphere of radius 36 cm is submerged in a lake at a depth where the pressure is \(10^7 \mathrm{~Pa}\), then the change in the radius of the sphere is \((\) Bulk modulus of brass \(=60 \mathrm{GPa})\)TS EAMCET 2025 Medium
- A cylinder consists of a gas mixture of helium and oxygen. If the mass of helium is \(4 \mathrm{~g}\) and the mass of oxygen is \(32 \mathrm{~g}\), then the ratio of specific heat of the mixture \(\left(C_p / C_V\right)\)TS EAMCET 2021 Easy
- Two cells \(A\) and. \(B\) are connected in the secondary circuit of a potentiometer one at a time and the balancing length are respectively \(400 \mathrm{~cm}\) and \(440 \mathrm{~cm}\). The emf of the cell \(A\) is 1.08 volt. The emf of the second cell \(B\) in volts isTS EAMCET 2004 Medium
- At an instant, a plane electromagnetic wave has its magnetic field in the direction of the vector \(\hat{\mathbf{i}}-\hat{\mathbf{j}}\) and its electric field is in the direction of \(\hat{\mathbf{i}}+\hat{\mathbf{j}}\). The wave is travelling along which direction?TS EAMCET 2020 Easy
- The distance for which ray optics becomes a good approximation for an aperture of 0.3 cm and a light of wavelength \(6000 Å\) isTS EAMCET 2025 Medium
- The \(L-C-R\) circuit shown below is driven by an ideal AC voltage source.
At frequency \(f=\frac{1}{2 \pi \sqrt{L C}}\), choose the correct statement.TS EAMCET 2020 Easy