Physics · 2016
NEET 2016 · 1 May · Code Y · Q111
Coefficient of linear expansion of brass and steel rods are α_1 and α_2. Lengths of brass and steel rods are l_1 and l_2 respectively. If (l_2-l_1)…
Coefficient of linear expansion of brass and steel rods are $\displaystyle \alpha_1$ and $\displaystyle \alpha_2$. Lengths of brass and steel rods are $\displaystyle l_1$ and $\displaystyle l_2$ respectively. If $\displaystyle \left(l_2-l_1\right)$ is maintained same at all temperatures, which one of the following relations holds good ?
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle \alpha_1 l_1=\alpha_2 l_2$
More from Thermal Properties of Matter
- A body cools from a temperature 3 T to 2 T in 10 minutes. The room temperature is T. Assume that Newton's law of cooling is applicable. The…2016
- The power radiated by a black body is P and it radiates maximum energy at wavelength, λ_0. If the temperature of the black body is now changed so…2018
- A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power…2017
- A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of…2019
- A cup of coffee cools from 90^° C to 80^° C in t minutes, when the room temperature is 20^° C. The time taken by a similar cup of coffee to cool from…2021
- The quantities of heat required to raise the temperature of two solid copper spheres of radii r_1 and r_2(r_1=1.5 r_2) through 1 K are in the ratio:2020
- The temperature of a metallic sphere of radius R is increased by a small amount Δ T. If the linear coefficient of thermal expansion of the metal is…2026
- Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_1 and K_2. The thermal…2017
NEET (UG) 2016 Physics question, with the answer from NTA’s final answer key. Where our answers come from.