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Physics
WAEC / WASSCE 1990
Units, Measurements & Dimensional Analysis
Which of the following instruments is suitable for making the most accurate measurement of the internal diameter of a test tube?
A
metre rule
B
A pair of callipers
C
A micrometer screw gauge
D
A tape rule
E
A set square
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 #24080)
Physics
WAEC / WASSCE 1990
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
A particle of mass 2.5 x 10-6kg revolving around the earth has a radial acceleration of 4 X 107 ms-2. What is the centripetal force of the particles?
A
6.25 x 10-14N
B
1.60 x10-13N
C
5.00 x 10N
D
1.00x102N
E
2.00x1O2N
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
F = ma = 2.5 x 10-6 x 4 x 107 = 100N
Source: Myschool Past Questions Archive (Record #24081)
Physics
WAEC / WASSCE 1990
Work, Energy, Power & Simple Machines
Diagram
Solution
An oscillating pendulum has a velocity of 2ms-1 at the equilibrium position O and velocity at same point P. Using the diagram above, calculate the height of P above O. (Take g = 10ms2)
Attached Figure / Diagram
A
5.0m
B
2.0m
C
0.4m
D
0.2m
E
0.1m
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Kinetic energy at O = P.E at P 1/2mV = mgh
h = v/2g = 0.2m
Source: Myschool Past Questions Archive (Record #24082)
Physics
WAEC / WASSCE 1990
Current Electricity & Electric Circuits
Which of the following are contact forces? I. Force of tension II. Force of fiction, III. Magnetic force III Force of reaction.
A
I,II and III only
B
I, II and IV only
C
I, III and IV only
D
II, III and IV only
E
l and IV only.
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 #24083)
English Language
UTME / JAMB 1990
Synonyms (Nearest in Meaning)
'Restricted code' and 'elaborate code' are
A
synonyms
B
homonyms
C
contradictions
D
antonyms
medium Difficulty
Verified Correct Answer: Option D
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #15029)
English Language
UTME / JAMB 1990
Reading Comprehension, Summary & Composition
Solution
It can be assumed reasonably that language has
A
only one code
B
two codes
C
three codes
D
three codes,two used for education
E
more than three codes but only two used for education
medium Difficulty
Verified Correct Answer: Option B
Grammar & Contextual Explanation
From the passage, two types of language codes are clearly identified:
Restricted code → commonly used by lower working-class children
Elaborated code → required in school and used by middle-class children (along with restricted code)
The entire discussion centres on these two forms of language use, meaning language in this context operates with two codes.
Source: Myschool Past Questions Archive (Record #15030)
English Language
UTME / JAMB 1990
Lexis, Structure & Register (Cloze & Vocabulary)
'The school system does not talk to him' means that the
A
teachers do not talk to him
B
teachers talk to him differently from the way other pupils do
C
headmaster and teachers do not talk to him
D
teachers talk to him differently from the way hie is talked to at home
medium Difficulty
Verified Correct Answer: Option D
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #15031)
English Language
UTME / JAMB 1990
Question Tags, Modals & Pronouns
Books are different from other goods because
A
customers for the book trade are much restricted
B
books are not manufactured but printed
C
one cannot tell so easily which books will prove saleable
D
books can be kept in stock much longer than other goods
medium Difficulty
Verified Correct Answer: Option C
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #15032)
English Language
UTME / JAMB 1990
Lexis, Structure & Register (Cloze & Vocabulary)
The problem of selection in the book trade involves
A
holding a stock large enough for the public to choose from
B
determing which books will sell fast
C
being a sales representative of large publishing houses
D
being able to review the lastest publications
medium Difficulty
Verified Correct Answer: Option B
Grammar & Contextual Explanation
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #15033)
Physics
WAEC / WASSCE 1990
Current Electricity & Electric Circuits
Diagram
Solution
An object R leaves a platform XY with a horizontal velocity of 7m-1 and lands at Q. lf it takes the same object 0.3s to fall freely from Y to P, calculate the distance PQ.(Take g = 1Oms2)
Attached Figure / Diagram
A
7.30m
B
2.55m
C
2.10m
D
1.65m
E
0.45m.
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
D = v x t = 7 x 0.3 = 2.1m
Source: Myschool Past Questions Archive (Record #24089)
Physics
WAEC / WASSCE 1990
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
A simple pendulum makes 50 oscillations in one minute. What is its period of oscillation?
A
0.02s
B
0.20s
C
0.83s
D
1.20s
E
50.00s
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
T = t/no. of oscillation = 1 x 60/50 = 1.2s
Source: Myschool Past Questions Archive (Record #24090)
Physics
WAEC / WASSCE 1990
Current Electricity & Electric Circuits
Diagram
Solution
The body P shown in the diagram above is in equilibrium. If the mass Q of the body is 10kg, calculate the tension T in the string. (Take g = 10ms2)
Attached Figure / Diagram
A
20/√3N
B
20N
C
50N
D
200√3N
E
200N
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
T = P/cos60o = 100/cos60o = 200N
Source: Myschool Past Questions Archive (Record #24091)
Physics
WAEC / WASSCE 1990
Equilibrium of Forces, Moments & Flotation
An object weighs 10.0 N in air and 7.0 N in water. What is its weight when immersed in a liquid of relative density 1.5?
A
4.50N
B
4.67N
C
5.50N
D
6.67N
E
8.50N
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 #24092)
Physics
WAEC / WASSCE 1990
Current Electricity & Electric Circuits
The absolute zero temperature is defined as the temperature at which
A
thermal motion ceases
B
the temperature of a gas is 273oC
C
ice melts
D
the volume of a real gas is maximum
E
the pressure of a real gas is maximum
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 #24093)
Physics
WAEC / WASSCE 1990
Work, Energy, Power & Simple Machines
Solution
A plane inclined at an angle at 30o to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 120 N uniformly up the plane is
A
40√3N
B
60N
C
120N
D
200N
E
240N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
E = \(\frac{\text{M.A}}{\text{V.R}}\) ; \(\frac{50}{100}\) = \(\frac{\text{M.A}}{2}\)
M.A = 1; \(\frac{\text{L}}{\text{E}}\) = 1
E = L = 120N
Source: Myschool Past Questions Archive (Record #24084)