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 24616–24630 of 29821 verified questions
Sort by:
Physics
WAEC / WASSCE 1991
Current Electricity & Electric Circuits
A boatman facing north wants to cross a flowing river to a point directly opposite its position at the other bank. If the river is flowing eastwards, in what direction should he row his boat?
A
west
B
east
C
north-west
D
north-east
E
south-west
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 #33215)
Physics
WAEC / WASSCE 1991
Temperature, Thermometry & Thermal Expansion
Diagram
The diagram above represents six maximum and minimum thermometer. If the temperature of the surrounding falls, which of the following correctly states how the thermometer would respond to the change in temperature?
Attached Figure / Diagram
A
S1, would move upward but S2 would not move
B
S1 would not move but S2 would move upwards
C
both S1 and S2 would move upwards
D
S1 would move downwards and S2 would move downwardw
E
S1 would move downwards and S2 wouldnmove downwards
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 #33240)
Physics
WAEC / WASSCE 1991
Temperature, Thermometry & Thermal Expansion
Solution
A wire, 20m long is heated from a temperature of 5oC to 55oC. If the change in length is 0.020m, calculate the linear expansivity of the wire
A
1.0 x 10-3k-1
B
2.0 x 10-4k-1
C
2.0 x 10-5k-1
D
1.0 x 10-5k-1
E
2.0 x 10-6k-1
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(\alpha = \frac{\Delta L}{L \Delta \theta} = \frac{0.020}{20 \times (55 - 5)} = 2.0 \times 10^{-5}\)
Source: Myschool Past Questions Archive (Record #33269)
Physics
WAEC / WASSCE 1991
Current Electricity & Electric Circuits
Diagram
Solution
The set-up illustrated above shows a capillary tube of uniform cross-sectional area in two different arrangements. Using the data in the diagrams. Calculate the pressure of the atmosphere
Attached Figure / Diagram
A
76cm of Hg
B
75cm of Hg
C
74cm of Hg
D
60cm of Hg
E
45cm of Hg
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
P1 = p + 15, p2 = p - 15
v1 = 30cm, v2 = 45cm
P1v1 = p2v2
p = 75cm of Hg
Source: Myschool Past Questions Archive (Record #33290)
Physics
WAEC / WASSCE 1991
Current Electricity & Electric Circuits
what part of the camera corresponds to the iris of the eye?
A
shutter
B
film
C
lens
D
diaphram
E
focusing ring
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 #33409)
Physics
WAEC / WASSCE 1991
Waves, Sound & Vibrations
Which of the following is not a mechanical wave?
A
wave propagatd in stretched string
B
wave in closed pipe
C
radio waves
D
water waves
E
sound waves
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 #33410)
Physics
WAEC / WASSCE 1991
Waves, Sound & Vibrations
Solution
Which of the following remains unchanged as light travels from one medium to the other? i. speed. ii. wavelength. iii. frequency.
A
i only
B
ii only
C
iii only
D
i and ii only
E
i and iii only
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
The frequency of the light ray remains same when it travels from one medium to another because it depends on the source of light. But the wavelength and speed vary because they depend on the medium through which the light passes.
Source: Myschool Past Questions Archive (Record #33411)
Physics
WAEC / WASSCE 1991
Current Electricity & Electric Circuits
Which of the following statements about wave is not correct? i. A wavefront is a line which contains all particles whose vibration are in phase. ii. The direction of propagation of a wave is the link drawn parallel to the wavefront. iii. A wavefront is a circle which is common to particles that are in the same state of disturbance
A
i only
B
ii only
C
i and ii only
D
i and iii only
E
ii and iii only
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 #33412)
Physics
WAEC / WASSCE 1991
Current Electricity & Electric Circuits
What type of motion does the skin of a talking drum perform when its being struck with the drum stick?
A
random
B
rational
C
vibratory
D
translational
E
circular
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 #33413)
Physics
WAEC / WASSCE 1991
Reflection, Refraction & Dispersion of Light
Solution
A ray of light is incident at an angle of 30º on a glass prism of refractive index 1.5. Calculate the angle through which the ray is minimally deviated in the prism. (The medium surrounding the prism is air)
A
10.5o
B
19.5o
C
21.1o
D
38.9o
E
40.5o
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
n = \(\frac{sin i}{sin r}\)
sin r = \(\frac{30^o}{n}\)
sin r = \(\frac{0.5}{1.5}\)
sin r = 0.3333
r = sin\(^{-1}\)(0.333) = 19.5º
At minimum deviation, the ray passes symmetrically, so A = 2r
A = 2 x 19. 5 = 38.94
But minimum deviation = 2i - A
= 2 x (30º) - 38.94 = 21.06º
:
Source: Myschool Past Questions Archive (Record #33400)
Physics
WAEC / WASSCE 1991
Reflection, Refraction & Dispersion of Light
Diagram
Solution
Calculate the refractive index of the material of the glass block shown in the diagram if YZ = 4cm
Attached Figure / Diagram
A
0.40
B
0.60
C
1.50
D
1.67
E
2.50
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
n = \(\frac{\text{real depth}}{\text {apparent depth}}\)
\(\frac{10}{10^{-4}}\) = 1.6
Source: Myschool Past Questions Archive (Record #33401)
Physics
WAEC / WASSCE 1991
Current Electricity & Electric Circuits
An image which can be formed on a screen is said to be
A
virtual
B
blurred
C
inverted
D
erect
E
real
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 #33405)
Physics
WAEC / WASSCE 1991
Waves, Sound & Vibrations
Solution
Which of the following are true of plane-polarised light? i. Plane polarisation of light is the formation of hydrogen bubbles on the particle of light. ii. Plane polarisation of light is the splitting of light into its spectral components iii. A plane polarised light vibrates in one plane. iv. Polarisation of light is characteristic of transverse vibration
A
i and ii only
B
i and iv only
C
ii and iii only
D
iii and iv only
E
i and iii only.
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Plane-polarized light consists of waves that vibrate in a single plane. Polarization occurs in transverse waves, where the oscillations are perpendicular to the direction of wave propagation.
Source: Myschool Past Questions Archive (Record #33407)
Physics
WAEC / WASSCE 1991
Lenses & Optical Instruments
At which of the following distances from the lens should a slide be placed on a slide projector if f is the focal length of the projector length?
A
less than f
B
greater than f but less than 3f
C
equal to f
D
equal to 2f
E
greater than 2f
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 #33408)
Physics
WAEC / WASSCE 1991
Current Electricity & Electric Circuits
The saturation vapour of a liquid depends on its
A
volume
B
temperature
C
mass
D
density
E
pressure
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 #33314)