Thermal Physics MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The amount of heat required to change a unit mass of a substance by 1°C is its:
A. Specific heat capacity
B. Latent heat
C. Heat capacity
D. Thermal conductivity
Answer: Specific heat capacity
The term used to describe the energy required to change the phase of a substance from gas to liquid is:
A. Latent heat of condensation
B. Latent heat of vaporization
C. Specific heat capacity
D. Thermal energy
Answer: Latent heat of condensation
The process of heat transfer through the movement of air or liquids is called:
A. Convection
B. Conduction
C. Radiation
D. Advection
Answer: Convection
The principle describing how the pressure of a gas is directly proportional to its temperature at constant volume is known as:
A. Gay-Lussac's law
B. Boyle's law
C. Charles' law
D. Avogadro's law
Answer: Gay-Lussac's law
The concept of ‘specific heat capacity’ refers to:
A. The amount of heat needed to raise the temperature of a unit mass of a substance by 1°C
B. The heat needed to change the phase of a substance
C. The rate of heat transfer through a material
D. The total energy of a system
Answer: The amount of heat needed to raise the temperature of a unit mass of a substance by 1°C
The principle stating that the entropy of a perfectly crystalline substance approaches zero as the temperature approaches absolute zero is known as:
A. Third law of thermodynamics
B. Second law of thermodynamics
C. First law of thermodynamics
D. Zeroth law of thermodynamics
Answer: Third law of thermodynamics
The process by which a gas turns directly into a solid is known as:
A. Deposition
B. Sublimation
C. Condensation
D. Freezing
Answer: Deposition
The term used to describe the total energy of a system, including kinetic and potential energy, is:
A. Internal energy
B. Thermal energy
C. Mechanical energy
D. Heat energy
Answer: Mechanical energy
The principle stating that energy is conserved in all physical processes is described by:
A. Law of conservation of energy
B. Law of conservation of mass
C. First law of thermodynamics
D. Second law of thermodynamics
Answer: Law of conservation of energy