Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 2>Q 19

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Volume expansion coefficient of a gas at constant pressure equal to:

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Important Questions on Thermal Properties of Matter

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 2>Q 20

Two large holes are cut in a metal sheet, as shown below. If this is heated, distance $A B$ and $B C$

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 2>Q 21

The volume of a solid decrease by

0.6 %

, when it is cooled through

50 °C

. If coefficient of linear expansion is,

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 2>Q 22

The coefficient of linear expansion of brass and steel are $α_{1}$ and $α_{2}$ . If we take a brass rod of length $l_{1}$ and steel rod of length $l_{2}$ at $0 ° C$ , their difference in length $(l_{2} - l_{1})$ will remain the same at a temperature if

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 2>Q 23

If the coefficient of cubical expansion is

x

times the coefficient of superficial expansion, then the value of

x

is

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 2>Q 24

Two rods identical in geometry but of different materials having co-efficient of thermal expansion

α_{1} and α_{2}

and Young’s modulii

Y_{1} and Y_{2}

respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods. If

α_{1} : α_{2} = 2 : 6

the thermal stresses developed in the two rods are equal provided

Y_{1} : Y_{2}

is equal to :

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 2>Q 25

An ideal gas is expanding such that

P T =

constant. The coefficient of volume expansion of the gas is

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 3>Q 1

A metal sphere of radius

r

and specific heat

c

is rotated about an axis passing through its centre at a speed of

n

rotations per second. It is suddenly stopped and

50 %

of its energy is used in increasing its temperature. Then the rise in temperature of the sphere is

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Physics Crash Course JEE Main>Chapter 8 - Thermal Properties of Matter>Level 3>Q 2

1 g

of ice at

0 ° C

is mixed with

1 g

of steam at

100 ° C

. After thermal equilibrium is achieved, the temperature of the mixture is