TS EAMCET · Physics · Thermal Properties of Matter
To increase the length of a metal rod by \(0.4 \%\), the temperature of the rod is to be increased by
(Coefficient of linear expansion of the metal \(=20 \times 10^{-6}{ }^{\circ} \mathrm{C}^{-1}\) )
- A 373 K
- B 473 K
- C 200 K
- D 100 K
Answer & Solution
Correct Answer
(C) 200 K
Step-by-step Solution
Detailed explanation
\( \Delta L / L = \alpha \Delta T \) \( \Delta T = \frac{\Delta L / L}{\alpha} \) \( \Delta T = \frac{0.004}{20 \times 10^{-6} \,^{\circ}\mathrm{C}^{-1}} \) \( \Delta T = 200 \, \mathrm{K} \)
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
- An air bubble rises from the bottom to the top of a water tank in which the temperature of the water is uniform. The surface area of the bubble at the top of the tank is \(125 \%\) more than its surface area at the bottom of the tank. If the atmospheric pressure is equal to the pressure of 10 m water column, then the depth of water in the tank isTS EAMCET 2025 Medium
- A coil has a resistance of \(30 \Omega\) and an inductive reactance of \(20 \Omega\) at \(50 \mathrm{~Hz}\) frequency. If an AC source of \(200 \mathrm{~V}\), \(100 \mathrm{~Hz}\) is connected across the coil, the current in the coil isTS EAMCET 2023 Easy
- If the dielectric constant of a substance \(K=\frac{4}{3}\), then the electric susceptibility \(\chi\) in terms of vacuum permittivity \(\varepsilon_0\) isTS EAMCET 2020 Medium
- A ball projected at an angle of \(45^{\circ}\) with the horizontal crosses two points at equal heights separated by a distance at times 2 s and 8 s respectively. The horizontal distance between the two points is
(Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )TS EAMCET 2025 Medium - An empty tank has concave mirror as its bottom. When sunlight falls normally on the mirror, it is focussed at a height of \(32 \mathrm{~cm}\) from the mirror. If the tank is filled with water upto a height of \(20 \mathrm{~cm}\), then the sunlight focusses at (refractive index of water \(=\frac{4}{3}\) )TS EAMCET 2023 Hard
- An object is placed in front of a spherical concave mirror between the focal point and the radius of curvature. Its image isTS EAMCET 2021 Hard
More PYQs from TS EAMCET
- A body of mass \(m\) thrown up vertically with velocity \(v_1\) reaches a maximum height \(h_1\) in \(t_1\) seconds. Another body of mass \(2 \mathrm{~m}\) is projected with a velocity \(v_2\) at an angle \(\theta\). The second body reaches a maximum height \(h_2\) in time \(t_2\) seconds. If \(t_1=2 t_2\), then ratio \(\left(\frac{h_1}{h_2}\right)\) isTS EAMCET 2015 Easy
- A bomb moving with velocity \((40 \hat{\mathbf{i}}+50 \hat{\mathbf{j}}-25 \hat{\mathbf{k}}) \mathrm{m} / \mathrm{s}\) explodes into two pieces of mass ratio \(1: 4\). After explosion the smaller piece moves away with velocity \((200 \hat{\mathbf{i}}+70 \hat{\mathbf{j}}+15 \hat{\mathbf{k}}) \mathrm{m} / \mathrm{s}\). The velocity of larger piece after explosion isTS EAMCET 2010 Medium
- A block of mass \(m\) placed on a rough horizontal plane is pulled by a constant power \(P\). The coefficient of friction between the block and the surface is \(\mu\). The maximum velocity of the block will beTS EAMCET 2020 Medium
- If \(\chi\) is the susceptibility and \(\mu_{\mathrm{r}}\) is the relative permeability of a ferromagnetic substance, thenTS EAMCET 2023 Medium
- A current of 4 A is passed through a square loop of side 5 cm made of a uniform manganin wire as shown in the figure. The magnetic field at the centre of the loop is
TS EAMCET 2025 Medium - The ratio of longest wavelengths of the spectral lines in the Lyman and Balmer series of hydrogen spectrum isTS EAMCET 2023 Easy