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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 8

Two rods of different materials having coefficients of linear expansion $α_{1}, α_{2}$ 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 rods. If $α_{1} : α_{2} = 2 : 3,$ the thermal stress developed in the two rods are equally provided. $Y_{1} : Y_{2}$ is equal to

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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 10

A circular hole in an aluminium plate is

2.54 \times 10^{- 2} m

in diameter at

0 ° C

, its diameter when the temperature of the plate is raised to

100 ° C

will be

(α = 2.55 \times 10^{- 5} {}^{\circ}C)

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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 11

A pendulum clock, made of a material having coefficient of linear expansion

α = 9 \times 10^{- 7} {}^{\circ}C

has a period of

0.500

sec at

20 ° C

. If the clock is used in a climate where temperature averages

30 ° C

, what correction is necessary at the end of

30

days to the time given by clock?

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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 12

A glass cylinder can contain

100 gm

of mercury at a temperature of

t_{0} = 0 ° C

. When

t_{1} = 20 ° C

, the cylinder can contain

99.7 gm

of mercury. In both cases the temperature of mercury is assumed to be equal to that of cylinder. The coefficient of volume expansion of mercury

γ = 18 \times 10^{- 5} {}^{\circ}C

. The coefficient of linear expansion of the glass will be

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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 13

Two metallic rods of length

l

and

3 l

have coefficient of linear expansion

' α'

and

' 3 α'

respectively. The coefficient of linear expansion for their series combination, is

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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 14

A liquid (coefficient of cubical expansion

γ_{l}

) is contained in a glass vessel of volume

V_{g}

(coefficient of cubical expansion

γ_{g}

) at a temperature. The volume, of liquid at this temperature is

V_{l}

Now the system is heated and it is found that at all temperatures, the volume of vessel, unoccupied by liquid always remains same, then

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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 15

2 gm

of steam condenses when passed through

40 gm

of water initially at

25 ° C

. The condensation of steam raises the temperature of water to

54.3 ° C

. What is the latent heat of steam?

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Gamma Question Bank for Engineering Physics>Chapter 10 - Thermal Properties of Matter>Assignment>Q 16

The temperature of

100 gm

of water is to be raised from

24 ° C

90 ° C

by adding steam to it. The mass of the steam required for this purpose is

When a copper ball is heated, the largest percentage increase will occur in its,

Important Questions on Thermal Properties of Matter

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