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 11: The general gas law can be written as
Options:
A) PV ÷ T = a constant
B) PV = a constant
C) v/t = a constant
D) p/T = a constant
Show Answer
The correct answer is A .
-
Question 12:
A resistance R is connected across the terminal of an electric cell of internal resistance 2Ω and the voltage was reduced to 3/5 of its nominal value.
The value of R is
Options:
A) 3 Ω
B) 2 Ω
C) 1 Ω
D) 6 Ω
Show Answer
The correct answer is A .
-
Question 13: If two charged plates are maintained at a potential difference of 3 kv, the work done in taking a charge of 600µc across the field is
Options:
A) 0.8j
B) 1.8j
C) 9.0j
D) 18.0j
Show Answer
The correct answer is B .
-
Question 14: The speed of light in air is 3 x 108ms-1. What is the speed in glass with a refractive index of 1.50?
Options:
A) 1.5 x 108ms-1
B) 3.0 x 108ms-1
C) 2.0 x 108ms-1
D) 6.0 x 108ms-1
Show Answer
The correct answer is C .
-
Question 15: Which of the following is stored by a dry Leclanche cell?
Options:
A) Electrical power
B) Kinetic energy
C) Electric current
D) Chemical energy
Show Answer
The correct answer is D .
-
Question 16: A conductor has a diameter of 1.00 mm and length 2.00m. if the resistance of the material is 0.1Ω, its resistivity is?
Options:
A) 2.55 x 105 Ωm
B) 2.55 x 102 Ωm
C) 3.93 x 10-6 Ωm
D) 3.93 x 10-8 Ωm
Show Answer
The correct answer is D .
-
Question 17: Which of the following phenomena is called photoelectric effect?
Options:
A) high energy electrons impinge on a metalic anode which then emits photons
B) a high energy photon emits photons as it slowed down
C) a metal absorbs quanta of light and then emits electrons
D) Two electrons are created from a quantum of light
Show Answer
The correct answer is C .
-
Question 18: Transistors are used for the
Options:
A) rectification of signals
B) conversion of a.c to d.c
C) amplification of signals
D) conversion of d.c to a.c
Show Answer
The correct answer is C .
-
Question 19: A mass of gas at 7oC and 70cm of mercury has a volume of 1200cm3. Determine its volume at 27oC and pressure of 75cm of mercury.
Options:
A) 1200cm3
B) 1378cm3
C) 4320cm3
D) 4629cm3
Show Answer
The correct answer is A .
-
Question 20: Which of the following is the exclusive property of a transverse wave?
Options:
A) diffraction
B) refraction
C) compression
D) polarization
Show Answer
The correct answer is D .