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 14206–14220 of 14893 verified questions
Sort by:
Physics
UTME / JAMB 1980
Waves, Sound & Vibrations
Solution
Which of the following statements about sound is NOT true?
A
sound is a longitudinal wave
B
sound can be reflected and refracted like light
C
sound travels through a vacuum
D
sound moves faster in a steel wire than in air
E
sound can ony be produced by vibrating objects
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.
Source: Myschool Past Questions Archive (Record #29115)
Physics
UTME / JAMB 1980
Lenses & Optical Instruments
Solution
In a compound microscope
A
there is only one lens
B
the objective lens have a shorter focal length than the eyepiece which is convex
C
the objective lens has a longer focal length than the eyepiece which is convex
D
the objective lens has a shorter focal length than the eyepiece which is concave
E
the objective and the eyepiece are both convex and have the same focal length
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
A compound microscope consists of two convex lenses: an objective lens O of small aperture and an eye piece E of large aperture. The lens which is placed towards the object is called objective lens, while the lens which is towards our eye is called eye piece. These two convex lenses i.e. the objective and the eye piece have short focal length and are fitted at the free ends of two sliding tubes at a suitable distance from each other. Although the focal length of both the objective lens and eye piece is short, but the focal length of the objective lens O is a little shorter than that of the eye piece E.
Source: Myschool Past Questions Archive (Record #29116)
Physics
UTME / JAMB 1980
Current Electricity & Electric Circuits
In sunlight, a blue flower looks blue because we see the flower by the light it
A
recieves from our eye
B
disperses
C
absorbs
D
refracts
E
reflects
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29117)
Physics
UTME / JAMB 1980
Magnetism, Electromagnetism & AC Circuits
High Tension(H.T.) transmission means
A
to transmit a given amount of power, the tension in the conducting wire must be high
B
heat is not lost when current is passed through a conductor
C
heat is gained when a given power is transmitted
D
a big transformer is required to transmit power
E
trasmission of power at low current and high voltage
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29119)
Physics
UTME / JAMB 1980
Current Electricity & Electric Circuits
The best material for the core of the primary and secondary coils of an induction coil is
A
copper, because it has a good conductor of electricity
B
steel, because it becomes magnetic and retains its magnetism for a long time
C
rubber, because it is a good insulator and the user is prevented from shock
D
soft iron, because it becomes magnetic but easily loses its magnetism
E
glass, because it is transparent
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 #29120)
Physics
UTME / JAMB 1980
Atomic, Quantum, Nuclear Physics & Electronics
Which of the following radiations cannot be deflected by a magnetic field?
A
\(\alpha\)
B
\(\beta\)
C
\(\gamma\)
D
\(\beta\) and \(\gamma\)
E
none of them
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 #29121)
Physics
UTME / JAMB 1980
Atomic, Quantum, Nuclear Physics & Electronics
Which of the following elements is the best absorber of X-rays?
A
hydrogen
B
oxygen
C
calcium
D
copper
E
lead
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29123)
Physics
UTME / JAMB 1980
Calorimetry, Latent Heat & Change of State
Solution
a calorimeter of thermal capacity 80j contains 20g of water at 25oC. Water at 100oC is added so that the final temperature of the set-ups is 50oC. The amount of water added is (Heat capacity of water = 4.18J/g/oC)
A
20g
B
25g
C
45g
D
50g
E
100g
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Heat lost = heat gained
mc\(\theta\) = c\(\theta\) + mc\(\theta\)
m x 4.18 x (100 - 50) = 80(50 -25) + [20 x 4.18] x (50 - 25)
m = 20g
Source: Myschool Past Questions Archive (Record #29127)
Physics
UTME / JAMB 1980
Temperature, Thermometry & Thermal Expansion
Solution
the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is
A
3
B
1.5
C
1.32
D
1
E
0.67
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
\(\alpha_1\)L1 = \(\alpha_2\)L2
\(\frac{L_1}{L_2}\) = \(\frac{\alpha_1}{1.5\alpha_2}\) (since a1- 1.5\(\alpha_2\))
\(\frac{L_1}{L_2}\) = 0.67
Source: Myschool Past Questions Archive (Record #29128)
Physics
UTME / JAMB 1980
Current Electricity & Electric Circuits
A man stands one-third of the way between two walls and claps his hands, He hears two distinct echoes 1s apart. If the speed of sound is 330ms-1 the distance between the wall is
A
33m
B
110m
C
220m
D
330m
E
495m
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29129)
Physics
UTME / JAMB 1980
Current Electricity & Electric Circuits
Solution
A cell has an open circuit voltage V1 and a closed circuit voltage V2 when a current is flowing through it. Therefore, the internal resistance of the cell is
A
\(\frac{V_2}{I}\)
B
\(\frac{V_1}{I}\)
C
\(\frac{(V_1 + V_2)}{I}\)
D
\(\frac{(V_1 - V_2)}{I}\)
E
\(\frac{(V_2 - V_1)}{I}\)
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
On open circuit, voltage = V\(_1\), On a closed circuit voltage drops due to internal resistance V\(_2\) = I r
But according to Ohm's law, voltage drop( V\(_d\) = I r
V\(_d\) = V\(_1\) - V\(_2\) = Ir
r = \(\frac{(V_1 - V_2)}{I}\)
Source: Myschool Past Questions Archive (Record #29130)
Physics
UTME / JAMB 1980
Atomic, Quantum, Nuclear Physics & Electronics
According to Ohm's law, the ratio V/I is constant for
A
an electrolyte
B
a diode
C
a transistor
D
silver
E
all of the above
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 #29131)
Physics
UTME / JAMB 1980
Current Electricity & Electric Circuits
In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the
A
same in sign and quantity
B
same in sign but greater
C
opposite in sign but greater
D
opposite in sign but less
E
opposite in sign but equal
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29132)
Physics
UTME / JAMB 1980
Atomic, Quantum, Nuclear Physics & Electronics
Solution
The activity of a radioactive substance depends on
A
temperature and purity
B
temperature and age
C
purity and age
D
age, purity and temperature
E
none of the above
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
Radioactive decay is a nuclear process; therefore, it is not affected by Temperature, Pressure, Chemical state, or purity.
Even if impurities are present, they do not change the decay rate of the radioactive nuclei.
Therefore, Activity depends on the half-life/decay constant and the quantity of radioactive atoms present.
Source: Myschool Past Questions Archive (Record #29133)
Physics
UTME / JAMB 1980
Atomic, Quantum, Nuclear Physics & Electronics
Solution
Natural radioactivity consists of the emission of
A
\( \alpha \) -particle and \( \beta \) rays
B
\( \alpha \) -particle and X-rays
C
\( \gamma \)-rays and X-rays
D
\( \alpha \)-particle, \( \beta \) rays and \( \gamma \)-rays
E
\( \alpha \) -particle, \( \beta \) rays, \( \gamma \)-rays and X-rays
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Natural radioactivity is the radioactivity found in nature, such as uranium, thorium ores, and natural nuclear fuels. It consists of the emission of radiations such as \alpha-particles, \beta-rays, and γ-rays
Source: Myschool Past Questions Archive (Record #29134)