AP EAMCET · PHYSICS · Thermal Properties of Matter
Two slabs \(A\) and \(B\) of different materials but of the same thickness are joined end to end to form a composite slab. The thermal conductivities of \(A\) and \(B\) are \(k_1\) and \(k_2\) respectively. A steady temperature difference of \(12^{\circ} \mathrm{C}\) is maintained across the composite slab. If \(k_1=\frac{k_2}{2}\), the temperature difference across slab \(A\) is
- A \(4^{\circ} \mathrm{C}\)
- B \(6^{\circ} \mathrm{C}\)
- C \(8^{\circ} \mathrm{C}\)
- D \(10^{\circ} \mathrm{C}\)
Answer & Solution
Correct Answer
(C) \(8^{\circ} \mathrm{C}\)
Step-by-step Solution
Detailed explanation
The given situation can be shown as Rate of flow of heat will be equal in both the slabs \(\begin{aligned} & \therefore & (12-x) K_1 & =K_2(x-0) \\ & & 12-x & =2 x \quad\left(\because K_1=\frac{K_2}{2}\right) \\ & & x & =4^{\circ} \mathrm{C} \end{aligned}\) The temperature…
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 thermo emf of a hypothetical thermocouple varies with the temperature \(\theta\) of hot junction as \(E=a \theta+b \theta^2\) in volts, where the ratio \(a / b\) is \(700^{\circ} \mathrm{C}\). If the cold junction is kept at \(0^{\circ} \mathrm{C}\), then the neutral temperature isAP EAMCET 2011 Medium
- An electron of mass ' \(m\) ' with initial velocity \(\vec{v}=v_0 \hat{i}\left(v_0\gt0\right)\) enters in an electric field \(\overrightarrow{\mathrm{E}}=-\mathrm{E}_0 \hat{i} \quad\left[\mathrm{E}_0\right.\) is constant \(\left.\gt0\right]\) at \(t=0\). If \(\lambda\) is its de-Brogli wavelength initially, then the de-Brogli wave length after time ' \(t\) ' isAP EAMCET 2024 Hard
- Along the \(x\)-axis, three charges \(\frac{q}{2},-q\) and \(\frac{q}{2}\) are placed at \(x=0, x=a\) and \(x=2 a\) respectively. The resultant electric potential at a point \(P\) located at a distance \(r\) from the charge \(-q(a < r)\) is \(\left(\varepsilon_0\right.\) is the permittivity of free space)AP EAMCET 2007 Hard
- Sir CV Raman got the Nobel prize in Physics for his work onAP EAMCET 2021 Easy
- When a light of wavelength \(4900 Å\) falls on a photosensitive metal, a negative \(2 \mathrm{~V}\) potential is required to stop the emitted electrons. Then, the work-function of the material is nearly
( given charge on electron \(=1.602 \times 10^{-19} \mathrm{C}\) and Planck's constant \(=6.625 \times 10^{-34} \mathrm{Js}\) )AP EAMCET 2021 Medium - A diatomic gas is heated at constant pressure, what fraction of the heat energy is used to increase the internal energy?AP EAMCET 2021 Medium
More PYQs from AP EAMCET
- If \((\sqrt{3}-\mathrm{i})^{\mathrm{n}}=2^{\mathrm{n}}, \mathrm{n} \in \mathrm{N}\), then the least possible value of n isAP EAMCET 2025 Medium
- AP EAMCET 2021 Easy
- From the v-t graph, find the total distance covered by the car in time \(t=t_1+t_2\)
AP EAMCET 2017 Hard - A one metre steel wire of negligible mass and area of cross-section \(0.01 \mathrm{~cm}^2\) is kept on a smooth horizontal table with one end fixed. A ball of mass \(1 \mathrm{~kg}\) is attached to the other end. The ball and the wire are rotating with an angular velocity of \(\omega\). If the elongation of the wire is \(2 \mathrm{~mm}\), then \(\omega\) is (Young's modulus of steel \(=2 \times 10^{11} \mathrm{Nm}^{-2}\) )AP EAMCET 2019 Hard
- The frequency of ac at which \(16 \mu \mathrm{F}\) capacitor and \(\frac{10}{\pi^2}\) \(\mathrm{mH}\) inductor will have same reactance isAP EAMCET 2023 Easy
- ' \(x\) ' mg of an organic compound was analysed by Kjeldahl method. The ammonia evolved was absorbed in 50 mL of \(0.5 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4\). The unused acid required 60 mL of 0.5 M NaOH solution for complete neutralisation. If the percentage of nitrogen in the compound is 56, the value of \(x\) isAP EAMCET 2025 Medium