Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 621:

  

  The figure above shows a plot of angles of deviation through a glass prism when light is incident at θ degrees on the prism. The incident angle that produces the minimum deviation is

  Options:
  A) 20^o
  B) 18^o
  C) 35^o
  D) 25^o
  Show Answer
  The correct answer is D .
• Question 622:

  Which of the following statements on the use of X-rays is incorrect? X-rays are used

  Options:
  A) In a hospital to obtain photographs of tissues and bones in the body
  B) For the treatment of malignant growths like cancer cells
  C) In detecting fingerprints
  D) To reveal hidden flaws in metal castings and welded joints work of art
  Show Answer
  The correct answer is C .
• Question 623:

  During the transformation of matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because

  Options:
  A) the heat energy is quickly conducted away
  B) the heat capacity has become very large as the substance melts
  C) the heat gained is equal to the heat lost by the substance
  D) all the heat is used to break the bonds holding the molecules of the solid together
  Show Answer
  The correct answer is D .
• Question 624:

  What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?

  Options:
  A) N0.65
  B) N0.39
  C) N3.90
  D) N0.13
  Show Answer
  The correct answer is D .
• Question 625:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 626: A satellite revolving around the earth is kept on its orbit by Options:
  A) Centripetal forces only
  B) Centripetal and frictional forces
  C) Centrifugal forces only
  D) Centripetal and centrifugal forces
  Show Answer
  The correct answer is D .
• Question 627:

  Totally reflecting prisms are preferred to mirrors in periscopes becauseI. mirror givegive multiple images

  II. silvering on mirrors is easy damaged

  III. mirrors reflect less light than totally reflecting prisms

  Options:
  A) I only
  B) I and II only
  C) I and III only
  D) II and III only
  E) I,II and III
  Show Answer
  The correct answer is D .
• Question 628:

  A vibrator causes water ripples to travel across the surface of a tank. The wave travels 50cm in 2s and the distance between successive crests is 5cm. Calculate the frequency of the vibrator

  Options:
  A) 5Hz
  B) 6Hz
  C) 5.2Hz
  D) 25Hz
  Show Answer
  The correct answer is A .
• Question 629: An object of mass 5.0 cg moving with a velocity of 12ms^-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V. Options:
  A) 12ms^-1
  B) 7ms^-1
  C) 6ms^-1
  D) 5ms^-1
  E) 4ms^-1
  Show Answer
  The correct answer is D .
• Question 630: Normal atmospheric pressure at sea-level is 10⁵Nm^-2 and the acceleration due to gravity is approximately 10ms^-1. If the atmosphere has a uniform density of 1kgm^-3, its height is Options:
  A) 100m
  B) 1000m
  C) 10 000m
  D) 100 000m
  E) 1000 000m
  Show Answer
  The correct answer is C .