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 151: The resultant force of a couple is ………?
Options:
A) Infinity
B) Zero
C) One
D) Half
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The correct answer is B .
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Question 152: The height at which the atmosphere ceases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is
Options:
A) 380mmHg
B) 570mmHg
C) 190mmHg
D) 480mmHg
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The correct answer is B .
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Question 153:

The value of T in the figure above is
Options:
A) 30N
B) 10.0N
C) 20N
D) 40N
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The correct answer is D .
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Question 154: If the volume of a fixed mass of a gas is kept constant, the pressure of the gas
Options:
A) is inversely proprotional to its centigrade temperature
B) is inversely proportional to its absolute temperature
C) is directly proportional to its centigrade temperature
D) is directly proportional to its absolute temperature
E) remains constant also
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The correct answer is D .
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Question 155: When vibration occurs in air column, the distance between a node and an antinode is equal to
Options:
A) one-quarter of the wavelength
B) one-hall of the wavelength
C) the wave length
D) twice the wavelength
E) four-times the wavelength
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The correct answer is A .
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Question 156: Two liquids, P at a temperature of 20oC and Q at a temperature of 80oC have specific heat capacities of 1.0Jkg-1oC-1 and 1.5J kg-1oC-1respectively. if equal masses of P and Q are mixed in a lagged calorimeter, then the equilibrium temperature is
Options:
A) 44oC
B) 50oC
C) 56oC
D) 60oC
E) 70oC
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The correct answer is C .
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Question 157: The sound from a source travelled to the bottom of the sea and the echo was heard 4s later. If the speed of sound in sea water is 1500ms-1 the depth of the sea is
Options:
A) 6000m
B) 3000m
C) 1500m
D) 375m
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The correct answer is B .
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Question 158: Calculate the peak voltage of a mains supply of r.ms. value 220V.
Options:
A) 121 V
B) 156 V
C) 225 V
D) 240 V
E) 311 V
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The correct answer is E .
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Question 159: Which of the following pairs of musical instruments produce sound due to the vibration of air column?
Options:
A) Bell and piano
B) Guitar and flute
C) Trumpet and drum
D) Trumpet and flute
E) Violin and organ
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The correct answer is D .
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Question 160: What is the length of liquid column in a barometer tube that would support an atmospheric pressure of 102000Nm-2 if the density of the liquid is 2600kgm-3? [g = 10ms-2]
Options:
A) 0.75m
B) 0.76m
C) 3.92m
D) 39.23m
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The correct answer is C .