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 1101: The temperature at which the water vapour present in the air is just sufficient to saturate air is
Options:
A) Boiling point
B) Ice point
C) Saturation point
D) Dew point
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The correct answer is D .
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Question 1102: In a projection lantern of focal length f, the object distance u, is such that
Options:
A) u > 2f > f
B) u < f < 2f
C) u = f < 2f
D) f < u < 2f
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The correct answer is D .
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Question 1103: The total length of a spring when a mass of 20g is hung from its end is 14cm, while its total length is 16cm when a mass of 30g is hung from the same end. Calculate the unstretched length of the spring assuming Hooke's law is obeyed.
Options:
A) 9.33cm
B) 10.00cm
C) 10.66cm
D) 12.00cm
E) 15.00cm
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The correct answer is B .
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Question 1104: Which of the following is an electrolyte?
Options:
A) Paraffin
B) Sugar solution
C) Grape fruit
D) Alcohol
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The correct answer is C .
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Question 1105: Which of the following correctly explain(s) why a green leaf appears green in bright day light? i. it absorbs only the green component of sunlight. ii. it absorbs all colour of sunlight except green. iii. it reflects only the green component of sunlight.
Options:
A) i only
B) ii only
C) i and iii only
D) ii and iii only
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The correct answer is D .
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Question 1106: A heater marked 50W will evaporate 0.005kg of boiling water in 50 seconds. The specific latent heat of vaporization of water in J/kg is
Options:
A) 5.0 x 106
B) 1.0 x 106
C) 2.5 x 106
D) 2.5 x 105
E) 5.0 x 105
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The correct answer is E .
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Question 1107: A Motor Tyre is inflated to pressure of 2.0 x 105Nm-2 when the temperature of air is 27oC. What will be the pressure in it at 87oC assuming that the volume of the Tyre does not change?
Options:
A) 2.6 x 105Nm-2
B) 2.4 x 105Nm-2
C) 2.2 x 105Nm-2
D) 1.3 x 105Nm-2
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The correct answer is B .
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Question 1108:
The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 180Hz?
Options:
A) 4
B) 3
C) 2
D) 1
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The correct answer is B .
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Question 1109: The major difference between a pure semiconductor and a pure metal is that
Options:
A) metals are harder than semiconductor
B) while resistance of metals decrease with temperature , the reverse is the case for semiconductor
C) the resistance of metals increases with temperature, while for semiconductors, it is the reverse
D) metals have forbidden gaps while semiconductors have not
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The correct answer is C .
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Question 1110: A parachute attains a terminal velocity when
Options:
A) its density is equal to the density of air
B) the viscous force of the air and the upthrust completely counteract its weight
C) it expands as a result of reduced external pressure
D) the viscous force of the air is equal to the sum of the weight and upthrust
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The correct answer is B .