If the length of a cylinder on heating increases by $2\%$, the area of its base will increase by ....... $\%$

Two rods are joined between fixed supports as shown in the figure. Condition for no change in the lengths of individual rods with the increase of temperature will be

( ${\alpha _1},\,{\alpha _2},$ = linear expansion coefficient

$A_1, A_2$ = Area of rods

$Y_1, Y_2$ = Young modulus)

On what does the value of coefficient of linear expansion depend ?

An ideal gas is expanding such that ${PT}^{3}=$ constant. The coefficient of volume expansion of the gas is:

A steel meter scale is to be ruled so that millimeter intervals are accurate within about $5 \times 10^{-5}$ $mm$ at a certain temperature. The maximum temperature variation allowable during the ruling is .......... $^oC$  (Coefficient of linear expansion of steel $ = 10 \times {10^{ - 6}}{K^{ - 1}})$

An iron bar of length $10\, m$ is heated from $0°C$ to $100°C.$ If the coefficient of linear thermal expansion of iron is $ 10 \times 10^{-6}{°C^{-1}}$, the increase in the length of bar is  .......... $cm$