Question Library
Browse, filter, and study verified past examination questions with step-by-step mathematical reasoning.
Searching 18,000+ Questions...
Sifting topics, KaTeX formulas & verified solutions
Showing 796–810 of 5315 verified questions
Sort by:
Physics
UTME / JAMB 2020
Thermal Physics
Diagram
In an experiment in which molten naphthalene is allowed to cool, the cooling curve i n the figure was obtained. The temperature 80\(^o\)C is known as the
Attached Figure / Diagram
A
cooling temperature
B
boiling point
C
melting point
D
vaporization point
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #56923)
Physics
UTME / JAMB 2020
Heat Energy & Temperature
Diagram
Solution
In the figure, the value of R is
Attached Figure / Diagram
A
3\(\Omega\)
B
6\(\Omega\)
C
4\(\Omega\)
D
5\(\Omega\)
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
R\(_T\) = \(\frac{V}{1} = \frac{12}{2}\) = 6\(\Omega\)
R\(_T\) = 3 + \(\frac{R \times 6}{R + 6}\)
R = 6\(\Omega\)
Source: Myschool Past Questions Archive (Record #56924)
Physics
UTME / JAMB 2020
Waves and Optics
Diagram
Solution
Which of the following instruments consumes the highest current?
I. Electric iron
II. Television set
III. Torchlight
IV. Immersion heater
250v
220v
6v
110v
1kW
110W
30W
500W
Attached Figure / Diagram
A
I
B
II
C
III
D
IV
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
(I) I = \(\frac{P}{V} = \frac{1000}{25}\) = 4A
(II) I = \(\frac{110}{220}\) = 0.5A
(III) I = \(\frac{30}{6}\) = 5A
(IV) I = \(\frac{500}{110}\) = 4.55A
Source: Myschool Past Questions Archive (Record #56925)
Physics
UTME / JAMB 2020
Waves and Optics
Diagram
In which of the following diagrams is the length of the tube equal to one wavelength?
Attached Figure / Diagram
A
a
B
b
C
c
D
d
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #56926)
Physics
UTME / JAMB 2020
Waves and Optics
Solution
Which of the following pairs is part of the electromagnetic spectrum?
I. Radio waves
II. sound waves
III. Gamma rays
IV. water waves
A
I and II
B
III and IV
C
I and III
D
II and IV
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Examples of electromagnetic waves are radio waves, X-rays, gamma rays, light rays, etc
Source: Myschool Past Questions Archive (Record #56927)
Physics
UTME / JAMB 2020
Heat Energy & Temperature
Solution
A substance has half of 3 min. After 6 min, the count rate was observed to be 400. What was its count rate at zero time?
A
1600
B
1200
C
200
D
2400
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Let the count rate at zero time be N
N \(\frac{3 min}{\to}\) \(\frac{N}{2}\) \(\frac{3 min}{\to}\) \(\frac{N}{4}\)
\(\frac{N}{4}\)
= 400
N = \(\frac{400}{N/4}\) x N
= 1600
Source: Myschool Past Questions Archive (Record #56928)
Physics
WAEC / WASSCE 2020
Mechanics and Properties of Matter
In collision between two objects, kinetic energy is conserved only if
A
one of the objects was initially at rest
B
potential energy is converted to work
C
the collision is inelastic
D
the collision is elastic
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #59362)
Physics
WAEC / WASSCE 2020
Mechanics and Properties of Matter
Solution
The quantity of motion of a body is its
A
acceleration
B
displacement
C
mometum
D
velocity
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Momentum is a physical quantity that describes the motion of an object. It is defined as the product of an object's mass and its velocity.
Unlike acceleration, displacement, and velocity, which describe different aspects of motion, momentum specifically quantifies the motion of a body.
Source: Myschool Past Questions Archive (Record #59363)
Physics
WAEC / WASSCE 2020
Mechanics and Properties of Matter
The volume of a fixed mass of a gas varies inversely as the pressure on it provided the temperature is constant. This statement is
A
Pressure law
B
Charles law
C
Boyle's law
D
General gas law
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #59364)
Physics
WAEC / WASSCE 2020
Heat Energy & Temperature
How would the capacitance of a parallel plate capacitor be affected if the distance of separation of its plates is decreased? It will
A
increase in value
B
decrease slightly
C
remain unchanged
D
drop to zero
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #59366)
Physics
WAEC / WASSCE 2020
Modern Physics and Nuclear Physics
Solution
The average distance moved by a molecule between collisions is called
A
molecular distance
B
intermolecular distance
C
mean distance
D
mean free path
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
- the mean free path is the average distance traveled by a moving particle (such as an atom, a molecule, a photon) between successive impacts .
Source: Myschool Past Questions Archive (Record #59368)
Physics
WAEC / WASSCE 2020
Waves and Optics
Solution
Which of the following waves requires a material medium for its propagation?
A
Radio waves
B
Light waves
C
Sound waves
D
X-rays
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
- Electromagnetic waves are waves that have no medium to travel whereas mechanical waves need a medium for its transmission.
- sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum.
Source: Myschool Past Questions Archive (Record #59369)
Physics
WAEC / WASSCE 2020
Heat Energy & Temperature
The depolarising agent in a Leclanche cell is?
A
carbon rod
B
ammonium chloride
C
manganese (IV) oxide
D
zinc plate
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #59370)
Physics
WAEC / WASSCE 2020
Heat Energy & Temperature
The material used to slow down the neutrons in a nuclear reactor is
A
boron
B
copper
C
graphite
D
uranium
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #59371)
Physics
WAEC / WASSCE 2020
Heat Energy & Temperature
Which of the following statements explain why hot soapy water is more effective in cleaning oil-stained dishes?
A
The oil on the dishes repels the soap
B
soap and heat decrease the surface tension of oil
C
soap increases the surface tension of oil and water
D
Hot water increases the surface tension of oil
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #59372)