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 1591: A capacitor 8F is charged to a potential difference of 100V. The energy stored by the capacitor is
Options:
A) 1.0 x 104J
B) 8.0 x 10J
C) 1.25 x 10J
D) 4.0 x 10-2J
Show Answer
The correct answer is D .
-
Question 1592: Which of the following instruments has a pure tone?
Options:
A) guitar
B) vibrating strings
C) tuning fork
D) siren
Show Answer
The correct answer is C .
-
Question 1593: The process whereby a liquid turns spontaneously into vapour is called?
Options:
A) regelation
B) sublimation
C) boiling
D) evaporation
Show Answer
The correct answer is D .
-
Question 1594: Which of the following is an electrolyte?
Options:
A) Paraffin
B) Sugar solution
C) Grape fruit
D) Alcohol
Show Answer
The correct answer is C .
-
Question 1595: A wire of 5Ω resistance is drawn out so that its new length is two times the original length. If the resistivity of the wire remains the same and the cross-sectional area is halved, the new resistance is
Options:
A) 40Ω
B) 20Ω
C) 10Ω
D) 5Ω
Show Answer
The correct answer is B .
-
Question 1596:

In the diagram above, which of the following velocity-time graphs shows uniform acceleration of a body from rest?
Options:
A) C
B) D
C) B
D) A
Show Answer
The correct answer is C .
-
Question 1597: A machine whose efficiency is 75% is used to lift a load of 1000N. Calculate the effort put in to the machine if it has a Velocity ratio of 4.
Options:
A) 343.32N
B) 233.33N
C) 333.33N
D) 334.33N
Show Answer
The correct answer is C .
-
Question 1598: The battery connection that permits current to flow across a p-n junction is called?
Options:
A) reverse baised
B) forward baised
C) amplification.
D) rectification
Show Answer
The correct answer is B .
-
Question 1599: The pressure of a given mass of a gas changes from 200Nm-2 to 120Nm-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is
Options:
A) 2 : 5
B) 5 : 4
C) 5 : 2
D) 4 : 5
Show Answer
The correct answer is B .
-
Question 1600: A quantity of sungas at -133 occupies 1/3m3 under pressure 1.4 x 105 Nm-2. if the gas occupies 31 m-2 at 37oC, its pressure will be
Options:
A) 1.26 x 103Nm-2
B) 3.3 x104Nm-2
C) 1.35 x 104Nm-2
D) 2.2 x 104Nm-2
E) 105Nm-2
Show Answer
The correct answer is B .