Thermal Physics

At constant temperature, the volume of a given mass of gas is inversely proportional to its pressure is:
1. Charle's law
2. Boyle' law
3. Avogadro's law
4. None of these
Ideal gas equation for n mole of gas:
1. PT = nRV
2. PV = nRT
3. PT = RV
4. All of these
At constant pressure, the volume of a given mass of gas is proportional to:
1. Temperature
2. Atmospheric pressure
3. Absolute temperature
4. None of these
Kelvin scale has zero reading at temperature:
1. $0 ° C$
2. $- 100 ° C$
3. $- 273 ° C$
4. $- 212 ° C$
The ratio of change in dimension to the original dimension per degree kelvin change in temperature is:
1. Coefficient of linear expansion
2. Coefficient of cubical expansion
3. Coefficient of thermal expansion
4. Coefficient of areal expansion
Linear expansion is related to:
1. Area
2. Length
3. Volume
4. Mass
Increase in area per unit area at $0 ° C$ per degree rise in temperature is:
1. Coefficient of linear expansion
2. Coefficient of superficial expansion
3. Coefficient of cubical expansion
4. None of these
Coefficient of linear expansion depends upon:
1. Pressure
2. Volume
3. Nature of material
4. None of these
Avogadro's Number is:
1. $6.023 \times 10^{23} m o l$
2. $6.025 \times 10^{25} m o l$
3. $6.24 \times 10^{24} m o l$
4. $6.022 \times 10^{22} m o l$
For the measurement heat in the body following one of these is used:
1. Thermometer
2. Calorimeter
3. Pressure gauge
4. Multimeter
Transfer of heat from the hot end to cold end with out-migration of a molecule of solids is called:
1. Convection
2. Conduction
3. Radiation
4. None of these
Process of transfer of heat through liquid and gases is:
1. None of these
2. Conduction
3. Radiation
4. Convection
Process of transfer of heat in the form of electromagnetic wave (light) for which material medium not necessary is:
1. Conduction
2. Radiation
3. Convection
4. None of these
Relation between $α$ , $β$ and $γ$ is:
1. $α = β = γ$
2. $α = \frac{β}{2} = 3 γ$
3. $α = \frac{β}{2} = \frac{γ}{3}$
4. $α = \frac{β}{2} = \frac{γ}{4}$
Which expansion coefficient $(α, β, γ)$ of a sunstance has largest and smallest magnitude?
1. $α, β$
2. $α, γ$
3. $γ, α$
4. $β, α$
Heat is a form of:
1. Solid
2. Liquid
3. Gas
4. Energy
Heat flows from one body to another if:
1. There is a difference of material
2. There is no difference of temperature
3. There is a difference of temperatures
4. There is a difference of density
The ice and steam point have values $32 ° F$ and $212 ° F$ respectively, on the Fahrenheit scale. Corresponding values on the Centigrade scale are:
1. $10 ° C a n d 112 ° C$
2. $5 ° C a n d 102 ° C$
3. $0 ° C a n d 100 ° C$
4. $- 5 ° C a n d 95 ° C$
180 equal intervals between two reference points on Fahrenheit scale correspond to:
1. 110 equal intervals on Celsius scale
2. 100 equal intervals on Celsius scale
3. 50 equal intervals on Celsius scale
4. 90 equal intervals on Celsius scale
The correct equation for converting between Fahrenheit temperature $t_{F}$ and Celsius temperature $t_{C}$ is:
1. $\frac{t_{F} - 32}{180} = \frac{t_{C}}{100}$
2. $\frac{t_{F} - 32}{160} = \frac{t_{C}}{100}$
3. $\frac{t_{F} + 32}{180} = \frac{t_{C}}{100}$
4. $\frac{t_{F} - 32}{180} = \frac{t_{C}}{120}$
Molar Specific Heat capacity has units of:
1. W/m.K
2. J/mol.K
3. J/kg.K
4. None of these
Plots of pressure as a function of temperature for gas thermometers containing different types and quantities of gas converge to the same point when extrapolated to zero pressure. The temperature value to which converge is:
1. $232.15 ° C$
2. $- 273.15 ° C$
3. $- 212.00 ° C$
4. $32.15 ° C$
Relation between Kelvin (T) and Celsius scales ( $t_{C}$ ) is:
1. $T = t_{C} + 273.15$
2. $T = t_{C} + 212.15$
3. $T = t_{C} + 32.15$
4. $T = t_{C} + 180.15$
If the substance is in the form of a long rod, then for small change in temperature, $∆ T$ , the fractional change in length, $\frac{∆ l}{l}$ , is:
1. Directly proportional to $∆ T$
2. Directly proportional to $\log ∆ T$
3. Inversely proportional to $∆ T$
4. Inversely proportional to $\log ∆ T$
Compared to glass copper expands:
1. Three times less
2. Five times more
3. About the same
4. Two times less
If V is the initial volume, $∆ V$ the fractional change in volume of a substance for temperature change $∆ T$ , the coefficient of volume expansion, $α V$ is defined as:
1. $α V = (\frac{∆ V}{V}) \frac{1}{∆ T}$
2. $α V = (\frac{V}{V}) \frac{1}{2 T}$
3. $α V = (\frac{V}{2 V}) \frac{1}{T}$
4. $α V = (\frac{2 V}{V}) \frac{1}{T}$
Which of these materials has low coefficient of volume expansion $α V$ ?
1. Paraffin
2. Pyrex glass
3. Alcohol
4. Water
Which of these materials have high coefficients of volume expansion $α V$ ?
1. Glass
2. Invar
3. Alcohol
4. Pyrex glass
Expansion of water is called anomalous because:
1. It expands on heating from $0 ° C t o 4 ° C$
2. It contracts on cooling from $4 ° C t o 0 ° C$
3. It contracts on heating from $0 ° C t o 4 ° C$
4. It expands on cooling from $10 ° C t o 4 ° C$
Animal and plant life in lakes and ponds are not destroyed because:
1. Freezing takes place at the bottom first
2. Freezing takes place at the top first and bottom layers are not frozen as temperature in bottom layers is more than zero
3. Water contracts on cooling at all temperatures
4. Water expands on heating at all temperatures

Thermal Physics

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