JAMB`S UTME 2011 PHYSICS Questions and Answers On Waves

49. A perfect emitter or absorber of radiant energy is a -----.

A. white body

B. black 

C. red body

D. conductor

Answer

50.Which of the following types of waves needs a medium for propagation?

A. Light waves

B. Radio waves 

C. Sound waves 

D. X-rays

Answer

51. Which of the following electromagnetic waves has the highest frequency?

A. Infra-red rays

B. X-rays

C. Ultra-violet rays

D. Radio waves

Answer

52. When the human eye loses its power of accommodation, the defect is known as….

A. astigmatism

B. long-sightedness

C. short-sightedness

D. presbyopia

Answer

53. A length of wire has a frequency of 255Hz when stretched by a force of 225N. If the force increases to 324N, what is the new frequency of vibration?

A.488Hz 

B. 356Hz 

C. 306Hz

D. 512Hz

Answer

54. A certain far-sighted person cannot see objects that are closer to the eye than 50cm clearly. Determine the power of the converging lens which will enable him to see at 25cm.

A. 0.03D 

B. 0.04D  

C. 0.06D   

D. 0.02D

Answer

55. Which of the following electromagnetic waves has the highest frequency?

A. infra-red rays  

B. X-rays  

C. ulta-violet rays 

D. radio waves

Answer

56. When a red rose flower is observed in  blue light, what does colour does the observer see?

A. magenta  

B. yellow  

C. blue  

D. red

Answer

57. The eclipse of the sun occurs when the ….

A. moon is not completely hidden in the earth`s shadow

 B. moon`s umbra falls on some parts of the earth

 C. moon is between the sun and the earth

 D. earth is between the sun and the moon

Answer

58. A cannon is fired from town X. After how long is the sound heard at a town Y 4.95km away?

A.12s

B. 15s 

C. 30s 

D. 10s

[Velocity of sound in air = 330m/s ]

Answer

59. An image in a convex lens is upright and magnified 3 times. If the focal length of the lens is 15cm, what is the object distance?

A. 16cm

B. 14cm

C. 10cm

D. 25cm

Answer

JAMB`S UTME 2012 PHYSICS Questions and Answers On Waves

39. Which of the following factors will affect the velocity of sound?

A. An increase in the pitch of the sound

B. An increase in the loudness of the sound

C. Wind travelling in the same direction of the sound

D. A change in the atmospheric pressure constant temperature

Answer

40. The characteristics of a vibration that determines its intensity is the…

A. frequency  

B. overtone

C. wavelength

D. amplitude

Answer

41. Where can a man place his face to get an enlarged image when using a concave mirror to shave?

A.  between the center of curvature and the principal focus

B. At the principal focus 

C. Between the principal focus and the pole 

D. At the center of curvature

Answer

42. A pinhole camera is placed 300m in front of a building so that the image is formed on the screen 5cm from the pinhole. If the image is 2.5cm high, the height of the building will be…

 A. 25m

B. 50m

C. 100m

D. 150m

Answer

43. The magnification of an object 2cm tall placed 10cm in front of a plane mirror is

A.6.0 

B. 1.0 

C. 0.7 

D. 0.6

Answer

44. After reflection from the concave mirror, rays of light from the sun converges 

A. at the radius of curvature 

B. at the focus 

C. beyond the radius of curvature

D. between the focus and the radius of curvature.

Answer

45. A glass block of thickness 10cm is placed on an object. If an observer views the object vertically, the displacement of the object is  …………… [ refractive index of glass = 1.5]

A. 3.33cm

B. 5.00cm 

C. 6.67cm 

D. 8.50cm

Answer

46. i. Rays of light travels from a less dense medium to a denser medium 

       ii. The angle of incidence is greater than the critical angle

       iii. Rays of light travels from a denser medium to a less dense medium

A. I and ii only 

B. I and iii only 

C. ii and iii only 

D. ii only

Answer

47. The use of lenses is not applicable in the…

A. projector  

B. human eye

C. periscope

D. telescope

Answer

48. Dispersion of white light is the ability of white light to

A. penetrate air, water and glass

B. move in a straight line

C. move around corners

D. separate into its component colours

Answer

JAMB`S UTME 2013 PHYSICS Questions and Answers On Waves

28. A wave that travels through a stretched strings is known as    

A. electromagnetic wave 

B. micro wave 

C. mechanical wave

 D. seismic wave

Answer

29. A transverse wave and longitudinal wave travelling in the same direction in a medium differ essentially in their   

A. frequency

B. amplitude 

C. direction of vibration of the particles of the medium 

D. period of vibration of the particles of the medium

Answer

30.What is the velocity of sound at 100⁰C if the velocity of sound at 0⁰C is 340m/s?

A. 497m/s   

B. 440m/s  

C. 397m/s   

D. 240m/s

Answer

31.If a sonometer has a fundamental frequency of 450Hz, what is the frequency of the fifth overtone?

A. 2700Hz 

B. 3700Hz 

C. 1700Hz 

D. 2250Hz

Answer

32. A man 1.5m tall is standing 3m in front of a pinhole camera whose distance between the hole and the screen is 0.1m. What is the height of the image of the man on the screen?

A. 0.05m   

B. 0.15m 

C. 0.30m 

D. 1.00m

Answer

33. A ray of light passing through the center of curvature of a concave mirror is reflected by the mirror at 

A. 0⁰ 

B. 45⁰ 

C. 90⁰ 

D. 180⁰

^Answer

34. From the diagram below, calculate the incident angle. 

  
  A.41⁰     
  B. 49⁰  
  C. 55⁰   
  D. 61⁰

Answer

35. Total internal reflection will not occur  when light travels from. 

A. water to air

B. water into glass 

C. glass into air   

D. glass into water

Answer

36. What does the diagram below represent?

A. telescope in normal use   

B. microscope in normal use 

C. telescope in abnormal use 

D. microscope in abnormal use

 Answer

37. If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively, calculate the angular magnification of the microscope.

A. 2 

B. 3 

C. 11 

D. 28

Answer

38. The angle of deviation of light of various colours passing through a triangular prism increases in the order 

A. red – green- blue    

B. green- violet - blue  

 C. blue-red-green   

D. blue-green-red

Answer