# General Science - Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, NDA, CDS and all one day examinations of India. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App

31. What do we call the distance of particle from the mean position at that instant in S.H.M?

[A] Distance
[B] Displacement
[C] Phase
[D] Angular frequency

32. What is the wavelength range of Radio waves?

[A] between 400 nm and 800 nm
[B] between 1 nm and 10-3 nm
[C] more than 0.1 m
[D] None of the above

33. Which of the following is NOT a mechanical wave?

[A] Sound wave
[B] Seismic wave
[C] Light wave
[D] Water waves

34. What is the speed of sound in air at 0 ºC?

[A] 3 x 108 m/s
[B] 344 m/s
[C] 441m/s
[D] 331 m/s

35. Which of the following can be measured using SONAR?

[A] distance of underwater objects
[B] direction of underwater objects
[C] speed of underwater objects
[D] All of the above

36. 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
[D] None of the above

37. What is the absorptive power of a perfectly black body?

[A] 0
[B] 1
[C] 100
[D] -100

38. Which of the following is true about a cyclic process?

[A] the total heat absorbed equals the work done by the system.
[B] the system returns to its initial state
[C] Both a and b
[D] None

39. Which of the following statements state that no process is possible whose sole result is the transfer of heat from a colder object to a hotter object?

[A] Kevin-Plank statement
[B] Einstein’s statement
[C] Clausius statement
[D] None of the above