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 101: The specific latent heat of vaporization of a substance is always
Options:
A) less than its specific latent heat of fusion
B) greater than its specific heat of fusion
C) equal to its specific latent heat of fusion
D) all of the above depending on the nature of the substance
E) none of the above
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The correct answer is B .
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Question 102: An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is
Options:
A) 30cm
B) 25cm
C) 20cm
D) 15cm
E) 10cm
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The correct answer is A .
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Question 103: Mr. F. Abioye observed his image though a plane mirror, kept a distance way from him at 4.7m in his room at what distance is the image found from Abioye eye?
Options:
A) 9.4m
B) 7.5m
C) 5.7m
D) 6.9m
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The correct answer is A .
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Question 104: The product PV where P is pressure and V is volume has the same unit as
Options:
A) force
B) power
C) energy
D) accelaration
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The correct answer is C .
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Question 105: A wheel and axle is used to raise a load of 500 N by the application of an effort of 250 N. If the radii of the wheel and the axle are 0.4 cm and 0.1 cm respectively, the efficiency of the machine is
Options:
A) 20 %
B) 40 %
C) 50 %
D) 60 %
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The correct answer is C .
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Question 106:
The diagram above shows a plank RS pivoted its center of gravity O and is in equilibrium with the weight P and Q. If a weight 2P is added to P the plank will be in equilibrium again by
Options:
A) moving Q nearer to O
B) moving P nearer to O
C) addding a weight Q to Q
D) moving P further away from O
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The correct answer is B .
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Question 107: A radio station broadcast at a frequency of 600KHZ. If the speed of light in air is 3 × 108ms. Calculate the wavelength of the radio wave
Options:
A) 2.20 × 10m
B) 5.0 × 10m
C) 5.0 × 10m
D) 11.8 × 10m
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The correct answer is B .
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Question 108: The pair of physical quantities consisting of vectors only are
Options:
A) momentum and power
B) velocity and distance
C) displacement and torgue
D) accelaration and speed
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The correct answer is C .
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Question 109: Which of the following obeys Ohm's Law?
Options:
A) Glass
B) Diode
C) All electrolytes
D) All metals
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The correct answer is D .
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Question 110: The velocity of a sound wave at 27oC is 360ms-1. Its velocity at 127oC is
Options:
A) 120√3 ms-1
B) 240 ms-1
C) 240√3 ms-1
D) 720√3 ms-1
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The correct answer is C .