Thermal Physics MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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In an isobaric process, which of the following remains constant?
A. Pressure
B. Volume
C. Temperature
D. Heat
Answer: Pressure
The process in which temperature remains constant while the volume and pressure of a gas change is known as:
A. Isothermal process
B. Adiabatic process
C. Isochoric process
D. Isobaric process
Answer: Isothermal process
Which law is described as the heat added to a system equals the sum of the increase in internal energy and the external work done?
A. First law of thermodynamics
B. Zeroth law of thermodynamics
C. Second law of thermodynamics
D. Third law of thermodynamics
Answer: First law of thermodynamics
What is the thermal conductivity of a material?
A. The ability of a material to conduct heat
B. The ability of a material to resist temperature changes
C. The rate at which heat is absorbed
D. The amount of heat required to raise its temperature
Answer: The ability of a material to conduct heat
The heat energy required to change the temperature of a substance is given by:
A. Q = mcΔT
B. Q = mv^2
C. Q = PΔt
D. Q = I^2Rt
Answer: Q = mcΔT
Which of the following describes heat conduction?
A. The transfer of heat through direct contact
B. The transfer of heat through a fluid
C. The transfer of heat by electromagnetic waves
D. The transfer of heat through phase change
Answer: The transfer of heat through direct contact
Which of the following is an example of convection?
A. Heat transfer through a metal rod
B. Warm air rising and cold air sinking in a room
C. Heat transfer through electromagnetic waves
D. Heat transfer through a vacuum
Answer: Warm air rising and cold air sinking in a room
What is the absolute zero temperature in Kelvin?
A. 0 K
B. 273 K
C. 100 K
D. -273 K
Answer: 0 K
The amount of heat required to convert 1 kilogram of a substance from a solid to a liquid at constant temperature is called:
A. Latent heat of fusion
B. Latent heat of vaporization
C. Specific heat capacity
D. Heat transfer coefficient
Answer: Latent heat of fusion