RRB Assistant Loco Pilot - Waves, heat and light: heat, sound, light and related concepts Online Test (MCQ Quiz)

1. Which type of wave requires a medium for propagation?

A) Electromagnetic waves B) Mechanical waves C) Light waves D) Radio waves

2. What is the SI unit of frequency?

A) Hertz B) Decibel C) Watt D) Joule

3. Which phenomenon explains why we can hear sounds around corners?

A) Reflection B) Refraction C) Diffraction D) Interference

4. What is the term for the maximum displacement of a particle from its equilibrium position?

A) Wavelength B) Amplitude C) Frequency D) Period

5. Which color of light has the longest wavelength?

A) Violet B) Green C) Yellow D) Red

6. What is the speed of sound in dry air at 20°C?

A) 343 meters per second B) 299,792,458 meters per second C) 1500 meters per second D) 331 meters per second

7. The transfer of heat through direct contact is called:

A) Conduction B) Convection C) Radiation D) Advection

8. Which of the following is NOT a primary color of light?

A) Red B) Green C) Blue D) Yellow

9. What is the phenomenon responsible for the formation of rainbows?

A) Reflection and refraction of sunlight by water droplets B) Diffraction of light around raindrops C) Scattering of light by atmospheric particles D) Polarization of light

10. What is the SI unit of heat energy?

A) Calorie B) Joule C) Watt D) Kelvin

11. Which type of mirror always forms a virtual, erect, and diminished image?

A) Plane mirror B) Convex mirror C) Concave mirror D) Spherical mirror

12. What is the minimum number of plane mirrors required to form an image of oneself from all directions?

A) Two B) Three C) Four D) Infinite

13. The loudness of a sound is determined by its:

A) Frequency B) Amplitude C) Wavelength D) Speed

14. Which property of light causes it to bend when it passes from one medium to another?

A) Reflection B) Refraction C) Diffraction D) Dispersion

15. What is the boiling point of water at standard atmospheric pressure in Celsius?

A) 0°C B) 100°C C) 212°C D) 37°C

16. Which part of the electromagnetic spectrum is responsible for heating effect of sun rays?

A) Visible light B) Ultraviolet rays C) Infrared rays D) X-rays

17. What is the term for the change in direction of light when it strikes a surface and bounces back?

A) Refraction B) Diffraction C) Reflection D) Interference

18. Which phenomenon is responsible for the blue color of the sky?

A) Absorption of light B) Scattering of light (Rayleigh scattering) C) Reflection of light D) Refraction of light

19. What is the unit of intensity of sound?

A) Hertz B) Decibel C) Pascal D) Newton

20. A concave lens is also known as a:

A) Converging lens B) Diverging lens C) Focusing lens D) Magnifying lens

21. What is the heat required to raise the temperature of 1 kg of a substance by 1°C called?

A) Specific heat capacity B) Latent heat C) Heat capacity D) Thermal conductivity

22. Which type of heat transfer is dominant in liquids and gases?

A) Conduction B) Convection C) Radiation D) Evaporation

23. The unit of power of a lens is:

A) Meter B) Diopter C) Joule D) Watt

24. What is the phenomenon of splitting of white light into its constituent colors called?

A) Scattering B) Interference C) Diffraction D) Dispersion

25. Which of the following is an example of a longitudinal wave?

A) Light wave B) Sound wave C) Radio wave D) Water wave

26. The time taken for one complete oscillation of a wave is called its:

A) Frequency B) Amplitude C) Period D) Wavelength

27. What is the temperature at which a solid changes into a liquid called?

A) Boiling point B) Freezing point C) Melting point D) Sublimation point

28. Which type of waves can travel through vacuum?

A) Mechanical waves B) Sound waves C) Electromagnetic waves D) Seismic waves

29. What is the ratio of the speed of a body to the speed of sound in the medium called?

A) Wave number B) Mach number C) Reynolds number D) Froude number

30. Which lens is used to correct myopia (nearsightedness)?

A) Convex lens B) Concave lens C) Cylindrical lens D) Bifocal lens

31. Which phenomenon explains why a swimming pool appears shallower than it actually is?

A) Reflection B) Refraction C) Diffraction D) Dispersion

32. The heat absorbed or released during a change of state at constant temperature is called:

A) Specific heat B) Heat capacity C) Latent heat D) Thermal energy

33. Which color of light has the shortest wavelength?

A) Red B) Orange C) Violet D) Blue

34. What is the distance between two consecutive crests or troughs of a transverse wave called?

A) Amplitude B) Frequency C) Period D) Wavelength

35. Which of the following is a source of heat energy?

A) Moon B) Sun C) Venus D) Stars (excluding Sun)

36. The process by which heat is transferred through the vibration of particles in a solid is:

A) Convection B) Radiation C) Conduction D) Advection

37. Which instrument is used to measure temperature?

A) Barometer B) Anemometer C) Thermometer D) Hygrometer

38. What is the unit of wavelength?

A) Hertz B) Meter C) Second D) Watt

39. Which type of mirror is used in headlights of cars to produce a parallel beam of light?

A) Plane mirror B) Convex mirror C) Concave mirror D) Spherical mirror

40. The phenomenon where light bends when passing through a small aperture is called:

A) Reflection B) Refraction C) Diffraction D) Interference

41. What is the SI unit of heat?

A) Degree Celsius B) Calorie C) Joule D) Kelvin

42. Which of the following is a form of electromagnetic radiation?

A) Sound B) Heat (conduction) C) Light D) Mechanical vibration

43. The pitch of a sound is determined by its:

A) Amplitude B) Frequency C) Wavelength D) Intensity

44. What is the process of a solid directly converting into a gas called?

A) Melting B) Freezing C) Evaporation D) Sublimation

45. Which lens is used to correct hypermetropia (farsightedness)?

A) Concave lens B) Convex lens C) Cylindrical lens D) Prism

46. The inverse of the period of a wave is its:

A) Amplitude B) Wavelength C) Frequency D) Velocity

47. What is the change of state from liquid to gas called?

A) Condensation B) Vaporization C) Solidification D) Melting

48. Which phenomenon causes the shimmering effect of objects seen over a hot surface?

A) Reflection B) Diffraction C) Dispersion D) Refraction

49. The SI unit of specific heat capacity is:

A) J/kg B) J/kg·K C) J/K D) J·kg/K

50. Which type of wave travels as compressions and rarefactions?

A) Transverse wave B) Electromagnetic wave C) Longitudinal wave D) Surface wave

Waves, heat and light: heat, sound, light and related concepts - Online Test

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