Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 41

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Two bars of copper having the same length but an unequal diameter is heated to the same temperature. The change in length will be -

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Important Questions on Thermal Properties of Matter

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 42

A metallic bar is heated from

0 ° C

to

100 ° C

. The coefficient of linear expansion is

10^{- 5} K^{- 1}

. What will be the percentage increase in length?

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 46

The coefficient of linear expansion of steel and brass are

11 \times 10^{- 6}^{o} C^{- 1}

and

19 \times 10^{- 6}^{o} C^{- 1}

, respectively. If their difference in lengths at all temperatures is to be kept constant at

30 cm

, then lengths at

0^{o} C

should be:

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 47

A solid ball of metal has a spherical cavity inside it. If the ball is heated, the volume of the cavity will,

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 49

A uniform metal rod is used as a bar pendulum. If the room temperature rises by

10 °C

, and the coefficient of linear expansion of the metal of the rod is

2 \times 10^{- 6}

per

°C

, then the period of the pendulum will have percentage increase of,

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 52

A rectangular block is heated from

0 ° C

to

100 ° C

. The percentage increase in its length is

0.10 %

. What will be the percentage increase in its volume?

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 54

If the moment of inertia of a solid body having

α

-coefficient of linear expansion is

I = m r^{2}

then the change in

I

corresponding to a small change in temperature

Δ T

is

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 55

A liquid of coefficient of volume expansion $γ$ fills a container of material having coefficient of linear expansion $α$ . If the liquid overflows on heating, then

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 57

The volume thermal expansion coefficient of an ideal gas at constant pressure and temperature

T K

is