In which case the thermal conductivity increases from left to right
A$Al, Cu, Ag$
B$Ag, Cu, Al$
C$Cu, Ag, Al$
D$Al, Ag, Cu$
Easy
Download our app for free and get started
A$Al, Cu, Ag$
a (a) $Cu$ is better conductor than $Al$ and $Ag$ is better conductor than $Cu$. Hence conductivity in increasing order is $Al < Cu < Ag$.
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
A body takes $T$ minutes to cool from ${62^o}C$ to ${61^o}C$ when the surrounding temperature is ${30^o}C$. The time taken by the body to cool from ${70^o}$ to $({A_1}\,{\rm{and }}{A_{\rm{2}}})$ is
A black body at $227^o C$ radiates heat at the rate of $7\; cals/cm^2 s$. At a temperature of $727^o C$, the rate of heat radiated in the same units will be
Six wire each of cross-sectional area $A$ and length $l$ are combined as shown in the figure. The thermal conductivities of copper and iron are $K_1$ and $K_2$ respectively. The equivalent thermal resistance between points $A$ and $C$ is :-
If two metallic plates of equal thicknesses and thermal conductivities ${K_1}$ and ${K_2}$ are put together face to face and a common plate is constructed, then the equivalent thermal conductivity of this plate will be
A cup of tea cools from ${80^0}C$ to ${60^o}C$ in one minute. The ambient temperature is ${30^o}C$. In cooling from ${60^o}C$ to ${50^o}C$ it will take ....... $\sec$
Two thermometers $A$ and $B$ are exposed in sun light. The valve of $A$ is painted black, But that of $B$ is not painted. The correct statement regarding this case is