Q. In the kinetic theory of gases, the temperature of a gas is a measure of: (2022)
  • A. The average potential energy of the molecules
  • B. The average kinetic energy of the molecules
  • C. The total energy of the gas
  • D. The number of molecules in the gas
Q. In the kinetic theory of gases, the term 'elastic collision' means: (2019)
  • A. Kinetic energy is conserved
  • B. Momentum is conserved
  • C. Both kinetic energy and momentum are conserved
  • D. Neither kinetic energy nor momentum is conserved
Q. In the kinetic theory, the internal energy of an ideal gas is primarily due to:
  • A. Potential energy
  • B. Kinetic energy of molecules
  • C. Work done on the gas
  • D. Heat energy
Q. In the kinetic theory, the temperature of a gas is a measure of: (2022)
  • A. The average potential energy of the molecules
  • B. The average kinetic energy of the molecules
  • C. The total energy of the gas
  • D. The speed of the gas molecules
Q. In the photoelectric effect, what happens to the kinetic energy of emitted electrons when the frequency of incident light is increased? (2021)
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. In the photoelectric effect, what happens to the kinetic energy of emitted electrons as the frequency of incident light increases? (2021)
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. In the photoelectric effect, what happens when the frequency of incident light is increased? (2020)
  • A. More electrons are emitted
  • B. Electrons are emitted with higher energy
  • C. No electrons are emitted
  • D. The current decreases
Q. In thin film interference, which of the following will not affect the interference pattern? (2022)
  • A. Thickness of the film
  • B. Wavelength of light
  • C. Angle of incidence
  • D. Color of the light source
Q. In which case does total internal reflection occur? (2022)
  • A. When light travels from a denser to a rarer medium
  • B. When light travels from a rarer to a denser medium
  • C. At the critical angle
  • D. None of the above
Q. In which direction does the magnetic field point inside a solenoid carrying current? (2023)
  • A. From south to north
  • B. From north to south
  • C. Perpendicular to the axis
  • D. It is zero
Q. In which of the following scenarios does the buoyant force act?
  • A. An object floating on water
  • B. A balloon rising in air
  • C. A ship in the ocean
  • D. All of the above
Q. In which process does a substance change from solid to gas without becoming liquid? (2022)
  • A. Melting
  • B. Sublimation
  • C. Condensation
  • D. Evaporation
Q. In which process does a substance change from solid to gas? (2022)
  • A. Melting
  • B. Sublimation
  • C. Evaporation
  • D. Condensation
Q. In which type of collision is kinetic energy conserved? (2019)
  • A. Elastic collision
  • B. Inelastic collision
  • C. Perfectly inelastic collision
  • D. All of the above
Q. The average speed of gas molecules is given by the formula:
  • A. (8kT/πm)^(1/2)
  • B. (3kT/m)^(1/2)
  • C. (2kT/m)^(1/2)
  • D. (kT/m)^(1/2)
Q. The average speed of gas molecules is given by which of the following expressions? (2022)
  • A. √(8RT/πM)
  • B. √(3RT/M)
  • C. √(2RT/M)
  • D. √(RT/M)
Q. The average speed of gas molecules is given by which of the following formulas? (2023)
  • A. (8kT/πm)^(1/2)
  • B. (3kT/m)^(1/2)
  • C. (2kT/m)^(1/2)
  • D. (kT/m)^(1/2)
Q. The buoyant force acting on an object submerged in a fluid is equal to:
  • A. The weight of the object
  • B. The weight of the fluid displaced
  • C. The density of the object
  • D. The pressure of the fluid
Q. The buoyant force on an object submerged in a fluid is equal to: (2022)
  • A. The weight of the object
  • B. The weight of the fluid displaced
  • C. The density of the object
  • D. The volume of the object
Q. The capacitance of a parallel plate capacitor is directly proportional to which of the following? (2019)
  • A. Distance between plates
  • B. Area of plates
  • C. Voltage across plates
  • D. Dielectric constant
Q. The capacitance of a parallel plate capacitor is given by which formula? (2020)
  • A. C = ε₀A/d
  • B. C = Q/V
  • C. C = 1/(4πε₀r)
  • D. C = V/I
Q. The capacitance of a spherical capacitor depends on which of the following? (2019)
  • A. Radius of the inner sphere
  • B. Radius of the outer sphere
  • C. Both radii
  • D. None of the above
Q. The concept of absolute zero is defined as the temperature at which: (2020)
  • A. Molecular motion ceases
  • B. Pressure is zero
  • C. Volume is zero
  • D. Density is maximum
Q. The concept of absolute zero refers to: (2020)
  • A. The lowest possible temperature
  • B. The temperature at which gas molecules stop moving
  • C. Both A and B
  • D. The temperature at which gas has maximum volume
Q. The critical angle for total internal reflection occurs when light travels from: (2019)
  • A. Air to water
  • B. Water to air
  • C. Glass to air
  • D. Air to glass
Q. The Earth's magnetic field is approximately how many times weaker than that of a typical refrigerator magnet? (2023)
  • A. 10 times
  • B. 100 times
  • C. 1000 times
  • D. 10000 times
Q. The efficiency of a Carnot engine depends on: (2022)
  • A. The temperature of the hot reservoir only
  • B. The temperature of the cold reservoir only
  • C. The temperatures of both the hot and cold reservoirs
  • D. The type of working substance used
Q. The efficiency of a heat engine is defined as the ratio of: (2023)
  • A. Work done to heat absorbed
  • B. Heat rejected to heat absorbed
  • C. Work done to heat rejected
  • D. Heat absorbed to work done
Q. The electric field between the plates of a parallel plate capacitor is given by which formula? (2020)
  • A. E = V/d
  • B. E = Q/A
  • C. E = CV
  • D. E = 1/(4πε₀r²)
Q. The electric field between the plates of a parallel plate capacitor is given by which expression? (2020)
  • A. E = V/d
  • B. E = d/V
  • C. E = CV
  • D. E = Q/A
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