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.
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Question 421: Which of the following gas laws is equivalent to the work done?
Options:
A) Boyle' law
B) Charles law
C) Pressure law
D) van der Waal's law
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The correct answer is A .
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Question 422: Which of the following are produced after a nuclear fusion process? i. one heavy nucleus. ii. neutrons-1. iii. protons. iv. Energy.
Options:
A) i and ii
B) i and iv
C) ii and iii
D) ii and iv
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The correct answer is B .
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Question 423: When light passes through two media x and y of refraction indices 1.51 and 1.33 respectively, the speed of light in
Options:
A) x is same as in y
B) x and y is same as in vacuum
C) x is higher than in y
D) y is higher than in x
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The correct answer is D .
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Question 424:
I. Moon.
II. Sun.
III.street light.
IV. stars.
Which of these above is a natural source of light?
Options:
A) II, III, and IV only
B) I, II and III only
C) III and IV only
D) II and IV only
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The correct answer is D .
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Question 425: If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited if a current of 4A flows through it for 4.8 hours?
Options:
A) 2.4g
B) 3.2g
C) 4.6g
D) 4.8g
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The correct answer is C .
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Question 426: A pilot records the atmospheric pressure outside its plane as 63cm of Hg while a ground observer records a reading of 75cm of Hg for the atmospheric pressure on the ground. Assuming that the density of the atmosphere is constant, calculate the height of the plane above the ground. (Relative density of Hg = 13.0 and that of air = 0.00013)
Options:
A) 1200m
B) 6300m
C) 7500m
D) 13800m
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The correct answer is A .
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Question 427:
A man will exert the greatest pressurewhen he?
Options:
A) lies flat on his back
B) lies on his belly
C) stands on both feet
D) stands on the toes of one foot
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The correct answer is D .
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Question 428: The photocell works on the principle of the
Options:
A) voltaic cell
B) emision of electrons by incident radiation
C) emision of protons by incident electrons
D) photographic plate
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The correct answer is B .
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Question 429: For a best result using temperature to achieve an accurate measurement, it is best to use
Options:
A) Mercury thermometer
B) gas thermometer
C) clinical thermometer
D) alcohol thermometer
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The correct answer is B .
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Question 430: An immersion heater rated 2.0A, 240V is used to boil water from temperature 52°c to 100°c. If the mass of the water is 2.5kg. determine the time taken to boil the water.
[specific heat capacity of water = 4.2 x 103 jkg-1 k-1]
Options:
A) 1.05 x 103s
B) 1.05 x 105s
C) 1.05 x 102s
D) 1.05 x 104s
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The correct answer is A .