31000+ Important MCQs for CDS

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Learn CDS MCQs with answers [Page 6 of Department 95]

H

Harikesh • 8.04K Points
Tutor III Physics

51) Which of the following is NOT a mechanical wave?

  • (A) Sound wave
  • (B) Seismic wave
  • (C) Light wave
  • (D) Water waves
Correct Answer - Option (C)

Explanation :

Sound wave, seismic wave and water waves are mechanical waves whereas light wave is an electromagnetic wave.

H

Harikesh • 8.04K Points
Tutor III Physics

52) What is the relation between Time period(T) and angular frequency(ω) of a wave?

  • (A) T = 2π/ω
  • (B) T = 2πω
  • (C) T = π/2ω
  • (D) T = ω
Correct Answer - Option (A)

Explanation :

Period T of oscillation of a wave is defined as the time any element of the medium takes to move through one complete oscillation. It is related to the angular frequency ω through the relation T = 2π/ω.

H

Harikesh • 8.04K Points
Tutor III Physics

53) Which of the following represents Charles’ law?

  • (A) Volume x Temperature = constant when Pressure is constant
  • (B) Volume/Temperature = constant when Pressure is constant
  • (C) Temperature = Volume when Pressure is constant
  • (D) None of the above
Correct Answer - Option (B)

No Explanation found. Add Explanation and get +2 points.

H

Harikesh • 8.04K Points
Tutor III Physics

54) What do we call the mode of transmission of heat by which heat travels from one part of a body to another by the actual motion of the heated particles of the body?

  • (A) Conduction
  • (B) Convection
  • (C) Radiation
  • (D) None of the above
Correct Answer - Option (B)

Explanation :

Convection is that mode of transmission of heat by which heat travels from one part of a body to another by the actual motion of the heated particles of the body.

H

Harikesh • 8.04K Points
Tutor III Physics

56) What do we call the process in which no exchange of heat energy takes place between the gas and the surroundings?

  • (A) Adiabatic
  • (B) Isothermal
  • (C) Isochoric
  • (D) Isobaric
Correct Answer - Option (A)

Explanation :

A process in which no exchange of heat energy takes place between the gas and the surroundings, is called an adiabatic process

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