What is meant by "linear expansion coefficient of copper" is 17 × 10 ° C - 1 ? Why does the value remain the same even in Kelvin scale?

The rate of change of unit length per unit degree change in temperature is known as the Coefficient of Linear Expansion. The term "expansion" refers to a change or increase in length. Linear expansion is defined as a change in length along one dimension (length) over a volume. As a result, it is assumed that a change in temperature will result in a change in the rate of expansion. If the linear expansion coefficient of copper is said to be 17 × 10 ° C - 1 , that much change in temperature happens for a change of unit length. It does not change even in Kelvin scale as it is a ratio.

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Linear expansion is directly proportional to the temperature.

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Important Questions on Thermal Physics

HARD

Science>Physics>Thermal Physics>Thermal Expansion

A metal ball initially at pressure of

10^{5} P_{a}

is heated from

20 ° C

127 ° C

keeping its volume constant. The coefficient of linear expansion of metal is

10^{- 5} (° C^{- 1})

and bulk modulus of metal is

2 \times 10^{11} N m^{- 2}

. The pressure inside the ball becomes

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

If two rods of lengths

L

and

2 L,

having coefficients of linear expansion

α

and

2 α

respectively are connected end-to-end, then find the average coefficient of linear expansion of the composite rod.

EASY

Science>Physics>Thermal Physics>Thermal Expansion

100 L

of gasoline maintained at

10 ° C

is filled into a steel tank. kept in a room at

10 ° C .

When the temperature of the room is increased to

30 ° C,

how much gasoline will overflow? Given.

α_{steel} = 12 \times 10^{- 6} {{}^{\circ}C}^{- 1}

and coefficient of volume expansion for gasoline

γ_{g a s o l i n e} = 95 \times 10^{- 5} {{}^{\circ}C}^{- 1}

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

What is the unit of coefficient of linear expansion of a solid?

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

An iron ring of radius

2.1 m

is to be fitted on top of the rim of a wheel of radius

2.121 m

. The coefficient of volume expansion for iron is

3.6 \times 10^{- 5} K^{- 1}

. By approximately how much should the temperature of the iron ring be increased so that it fits the rim of the wheel?

EASY

Science>Physics>Thermal Physics>Thermal Expansion

For a solid, how many types of thermal expansion coefficients are there?

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

A cylinder has a piston at temperature of

30 ° C

. There is all round clearance of

0.08 mm

between the piston and cylinder wall if internal diameter of the cylinder is

15 cm

. What is the temperature at which piston will fit into the cylinder exactly?

(α_{p} = 1.6 \times 10^{- 5} / {}^{\circ}C

and

α_{c} = 1.2 \times 10^{- 5} / {}^{\circ}C)

EASY

Science>Physics>Thermal Physics>Thermal Expansion

What is meant by "linear expansion coefficient of copper" is

17 \times 10 {° C}^{- 1}

? Why does the value remain the same even in Kelvin scale?

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

If the volume of a block of metal changes by

0.12 %

when heated through

20 ° C

, then find its coefficient of linear expansion.

EASY

Science>Physics>Thermal Physics>Thermal Expansion

A glass vessel of volume

V_{0}

is completely filled with a liquid and its temperature is raised by

Δ T

. What volume of the liquid will flow over, if the coefficient of linear expansion of glass is

α_{g}

and coefficient of volume expansion of the liquid is

γ_{L}

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

The real expansion of any liquid depends on the expansion of the vessel in which it is kept.

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

The area of cross-section of a railway track is $0.01 m^{2} .$ The temperature variation is $10 ° C .$ Coefficient of linear expansion of material of track is $10^{- 5} {}^{\circ}C^{- 1} .$ The energy stored per meter in the track is $J m^{- 1} .$ (Young's modulus of material of track is $10^{11} N m^{- 2}$ )

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

Among iron, invar and copper, which one has the least coefficient of linear expansion?

EASY

Science>Physics>Thermal Physics>Thermal Expansion

Balloon filled with gas bursts when taken close to fire. Why?

EASY

Science>Physics>Thermal Physics>Thermal Expansion

Which quantities remain fixed in the definition of volume expansion co-efficient of a gas? Name a non-metal which is good conductor of heat.

MEDIUM

Science>Physics>Thermal Physics>Thermal Expansion

Two metal rods made of steel and copper have coefficients of linear expansion

1.1 \times 10^{- 5} K^{- 1}

and

1.7 \times 10^{- 5} K^{- 1}

respectively. At room temperature

(300 K)

, the steel rod is

4 cm

longer than the copper rod. If the difference in their lengths remains same at all temperatures, then the lengths of the steel and copper rods respectively (at

300 K

) are

EASY

Science>Physics>Thermal Physics>Thermal Expansion

The ratio of linear expansivity to the co-efficient of a real expansion of a rectangular sheet of a solid is

EASY

Science>Physics>Thermal Physics>Thermal Expansion

The three types of expansion that takes place in solid are

HARD

Science>Physics>Thermal Physics>Thermal Expansion

Time period of a simple pendulum is

T

. The time taken to complete

\frac{5}{8}

oscillations starting from mean position is

\frac{α}{12} T

. The value of

α

______

EASY

Science>Physics>Thermal Physics>Thermal Expansion

Most matter contracts on heating and expands on cooling (Yes\No).

Linear expansion is directly proportional to the temperature.

Important Questions on Thermal Physics

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