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 766–780 of 784 verified questions
Sort by:
Physics
UTME / JAMB 1979
Waves and Optics
A man standing between two parallel mirrors in a barber's shop will see the following number of his own image
A
eight
B
two
C
four
D
one
E
infinite
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 #29189)
Physics
UTME / JAMB 1979
Waves and Optics
Solution
Which of the following statements is incorrect? The sensitivity of a galvanometer which incorporates an optical lever arrangement may be increased by providing
A
a larger number of turns in the coil
B
a thinner suspension with a small torsional control
C
a special alloy permanent magnet which gives a high magnetic flux
D
all of the above
E
a light source with a greater intensity
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
A light source with a greater intensity. While it can improve visibility, it does not affect the sensitivity of the galvanometer
Source: Myschool Past Questions Archive (Record #29191)
Physics
UTME / JAMB 1979
Waves and Optics
Solution
Which of the following statements is true? The frequency of a vibrating string is
A
proportional to its length
B
inversely proportional to the tension within it
C
proportional to the aptitude of vibration
D
inversely proportional to its cross-section
E
proportional to the square root of the tension within it
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
The frequency (f) of a vibrating string is determined by the laws of transverse vibrations, summarized by the formula:
f = \(\frac{\text{n}}{2L}\)\(\sqrt{\frac{T}{\mu}}\)
Where T is the tension, L is the length, and \(\mu\) is the mass per unit length. According to the Law of Tension, the frequency is directly proportional to the square root of the tension. (f ∝ \(\sqrt{T}\))
Source: Myschool Past Questions Archive (Record #29216)
Physics
UTME / JAMB 1979
Waves and Optics
Which of the following electromagnetic waves has the shortest wavelength?
A
Radio waves
B
X-rays
C
Infra-red
D
Blue light
E
Ultraviolet
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 #29219)
Physics
UTME / JAMB 1979
Waves and Optics
Solution
The speed of light in air is 3 x 108ms-1. If the refractive index of light from air-to-water is \(\frac{4}{3}\), then which of the following is the correct value of the speed of light in water?
A
4 x 108ms-1
B
2.25 x 108ms-1
C
\(\frac{4}{9}\) x 108ms-1
D
2.25 x 102ms-1
E
4.33 x 108ms-1
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Air to water = \(\frac{\text{speed in air}}{\text{speed in water}}\)
\(\frac{4}{3}\) = \(\frac{3 \times 10^8}{V}\)
4V = 3(3 x 108)
V = \(\frac{3(3 \times 10^8)}{4}\)
V = 2.25 x 108ms-1
Source: Myschool Past Questions Archive (Record #29223)
Physics
UTME / JAMB 1979
Waves and Optics
It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus?
A
an electron
B
a \(\beta\)-particle
C
an \(\alpha\)-particle
D
a proton
E
an atom
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 #29226)
Physics
UTME / JAMB 1979
Waves and Optics
Solution
Radio carrier waves are generated by causing electrons to oscillate rapidly in
A
a microphone
B
a television camera
C
an antenna
D
coaxial cables
E
a transmitter
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
Transmitters transform electrical signals into radio waves, causing electrons to oscillate rapidly, producing the carrier waves essential for communication. These waves are then transmitted through the air to receivers, allowing for transferring information such as audio, video, and data.
NOTE: Radio waves are generated artificially by an electronic device called a transmitter, which is connected to an antenna, which radiates the waves. They are received by another antenna connected to a radio receiver, which processes the received signal.
Source: Myschool Past Questions Archive (Record #29228)
Physics
UTME / JAMB 1979
Waves and Optics
Solution
A concave lens of focal length 20cm form an image 1/2 the size of the object. The object distance is
A
100cm
B
\( \frac{100}{q} \)
C
60cm
D
\( \frac{60}{7} \)
E
None of the above
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
V = \(\frac{U}{2}\)
f = 20cm
\(\frac{1}{f} = \frac{1}{u} + \frac{1}{v}\) = \(\frac{1}{20} = \frac{1}{u} + \frac{2}{u}\)
\(\frac{1}{20} = \frac{3}{u}\)
u = 60cm.
Source: Myschool Past Questions Archive (Record #41576)
Physics
UTME / JAMB 1979
Waves and Optics
Diagram
Solution
The diagram shows lens arrangement in
Attached Figure / Diagram
A
A Compound Microscope
B
astronomical telescope
C
binocular
D
periscope
E
projection lantern
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
An astronomical telescope consists of an objective with a long focal length and an eyepiece with a short focal length, usually used for observing celestial bodies
Source: Myschool Past Questions Archive (Record #41596)
Physics
UTME / JAMB 1979
Waves and Optics
Diagram
For the wave motion represented above
The wavelength is given by
Attached Figure / Diagram
A
p
B
q
C
r
D
s
E
t
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 #41602)
Physics
UTME / JAMB 1978
Waves and Optics
Solution
a guitar string is 75cm long. the wavelength of its fundamental note is
A
75cm
B
150cm
C
37.5cm
D
112cm
E
50cm
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Wavelength = 2L = 2 X 75
Wavelength = 150
Source: Myschool Past Questions Archive (Record #29309)
Physics
UTME / JAMB 1978
Waves and Optics
The boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels
A
mainly through air
B
fainter in stretched string
C
faster through gases than in solids and liquids
D
with greater ease through a string than in air
E
none of the above is correct
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 #29310)
Physics
UTME / JAMB 1978
Waves and Optics
Solution
an object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is
A
0.5cm
B
1.5cm
C
3cm
D
2.5m
E
2cm
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
\(\frac{\text{image distance}}{\text{object distance}}\) = \(\frac{\text{image height}}{\text{object height}}\)
\(\frac{30}{15}\) = \(\frac{\text{image height}}{1}\)
image height = 2cm
Source: Myschool Past Questions Archive (Record #29312)
Physics
UTME / JAMB 1978
Waves and Optics
Solution
The visible part of light consists of the following colours
A
red, indigo, infra-red, violet, yellow, green and blue
B
red, green, blue, violet, indigo, orange and yellow
C
blue, ultra-violet, infra-red, red, yellow, indigo, violet,green and orange
D
infra-red and ultra-violet
E
red, orange, yellow, green, blue, indigo and infra-red
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
The visible colors of white light is given by the acronym: ROYGBIV which stands for Red, Orange, Yellow, Green, Blue, Indigo and Violet.
Source: Myschool Past Questions Archive (Record #29314)
Physics
UTME / JAMB 1978
Waves and Optics
Solution
An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit distance from each mirror, the number of images formed is
A
1
B
2
C
3
D
4
E
5
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No. of image formed = \(\frac{360}{\theta}\) - 1
= \(\frac{360}{90}\) - 1
= 3 images
Source: Myschool Past Questions Archive (Record #29315)