Question 1.
Refrigeration is a process which
A. Kills bacteria
B. Slows down the bacterial growth
C. Inactivates the bacteria
D. Plasmolyses the bacteria
Ans: B. Slows down the bacterial growth
Question 2.
__ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system.
A. First law of thermodynamics
B. Hooke’s Law
C. The coulomb’s law
D. Faraday’s Law
Ans: A. First law of thermodynamics
Question 3.
In a refrigerator, the cooling system should always be
A. At the top
B. At the bottom
C. At the middle
D. Can be anywhere
Ans: B. At the bottom
Question 4.
Blowing Air with open pipe is an example of :
A. Isothermal process
B. Isochroric process
C.Isobaric process
D. Adiabatic process
Ans: C.Isobaric process
Question 5.
Which phase change is an example of an exothermic process?
A. Liquid to Solid
B. Gas to Solid
C. Gas to Liquid
D. All the above
Ans: D. All the above
Question 6.
In a refrigerator what produces the cooling ?
A. The ice which deposits on the freezer
B. The sudden expansion of a compressed gas
C. The evaporation of a volatile liquid
D. None of these
Ans: D. None of these
Question 7.
Which of the following is not reversible?
A. Joule effect
B. Peltier effect
C. Seebeck effect
D. Thomson effect
Ans: A. Joule effect
Question 8.
The velocity of heat radiation in vacuum is
A. Equal to that of light
B. Less than that of light
C. Greater than that of light
D. Equal to that of sound
Ans: A. Equal to that of light
Question 9.
Which of the following has the highest entropy?
A. Hydrogen
B. Diamond
C. Liquid nitrogen
D. Mercury
Ans: A. Hydrogen
Question 10.
In a diesel engine the high temperature needed to ignite the fuel is achieved by
A. Using heat from exhaust
B. The battery
C. Compressing air in the cylinders
D. An electrical spark
Ans: C. Compressing air in the cylinders
Question 11.
In a Carnot engine when heat is taken from the source, its temperature
A. Remains constant
B. Decreases
C. Increases
D. Decreases and then remains constant
Ans: A. Remains constant
Question 12.
Which of these branches of Physics deal with heat and temperature and their relation to energy and work?
A. Geophysics
B. Mechanics
C. Atomic Physics
D. Thermodynamics
Ans: D. Thermodynamics
Question 13.
Heat transfer horizontally within the atmosphere is called
A. Conduction
B. Convection
C. Absorption
D. Advection
Ans: D. Advection
Question 14.
Even after sunset, the air near the Earth’s surface continue to receive heat due to
A. Insolation
B. Terrestrial Radiation
C. Conduction
D. Convection
Ans: B. Terrestrial Radiation
Question 15.
The characteristic invalid for heat radiation is that it travels :
A. In a straight line
B. In all directions
C. With the speed of light
D. Heating the medium through which it passes
Ans: C. With the speed of light
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
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- Physics MCQs Set-76
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