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Physics
UTME / JAMB 2002
Heat Energy & Temperature
A transistor is used in the amplification of signals because it
A
controls the flow of current
B
consumes a lot of power
C
allows doping
D
contains electron and hole carriers
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 #12259)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Solution
A boy travels 8 km eastward to a point B and then 6km northward to another point C. Determine the difference between the magnitude of displacement of the boy and distance travelled by him
A
2.0km
B
4.0km
C
10.0km
D
13.0km
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
AC = \(\sqrt{8^2 + 6^2}\) = 10km
Distance travelled = 8 + 6 = 14km
Difference = 4 - 10 = 4km
Source: Myschool Past Questions Archive (Record #33967)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Solution
An object is released from rest at a height of 25m. Calculate the time it takes to fall to the ground. [g = 10ms-2]
A
25.00s
B
10.00s
C
2.50s
D
2.24s
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
t = \(\sqrt{\frac{2s}{g}} = \sqrt{\frac{2 \times 25}{10}} = 2.24\)
Source: Myschool Past Questions Archive (Record #33977)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Diagram
Solution
An object A is held in equilibrium as illustrated in the diagram above. Using the data on the diagram determine the magnitude, W of the weight of
Attached Figure / Diagram
A
23N
B
17N
C
7N
D
5N
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
W = \(\sqrt{15^2 + 8^2}\) = 17N
Source: Myschool Past Questions Archive (Record #33985)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Diagram
Solution
In the diagram above, AB represents a uniform rod of length 1.50m which is in equilibrium on a pivot at P, If AP = 40cm, calculate the mass of the rod. [g = 10ms-2]
Attached Figure / Diagram
A
0.280kg
B
0.400kg
C
0.613kg
D
0.800kg
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
m = \(\frac{0.7 \times 40}{35} = 0.8kg\)
Source: Myschool Past Questions Archive (Record #34008)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Solution
A block and tackle system has 6 pulleys. If the efficiency of the machine is 60%, determine its mechanical advantages
A
12.0
B
10.0
C
3.6
D
1.8
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
M.A = \(\frac{Z \times V.R}{100}\)
= \(\frac{60 \times 6}{100}\) = 3.6
Source: Myschool Past Questions Archive (Record #34019)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Which of the following actions will improve the efficiency of the pulley system?
A
reducing the mass of the pulley
B
increasing the friction force between the string and the pulley
C
increasing the mass per unit length of the string of the pulley
D
increasing the mass of the pulley
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 #34020)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
The silver coating on the inside of a vacuum flask reduces heat loss by
A
conduction
B
radiation
C
condensation
D
convention
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 #34025)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
What type of motion does the skin of a 'talking' drum perform when it is struck with a drum stick?
A
Random
B
Rational
C
Translational
D
vibratory
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 #34073)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
The size of the hole of a pin hole camera is increased. The resultant image formed becomes
A
sharper
B
reduced in size
C
enlarged
D
blurred
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 #34080)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Solution
The refractive index of a medium relative to air is 1.8. Calculate to the nearest degree, the critical angle for the medium
A
68o
B
56o
C
34o
D
18o
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
c = \(\sin^{-1} \frac{1}{n} = \sin^{-1} \frac{1}{1.8} = 34^o\)
Source: Myschool Past Questions Archive (Record #34081)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Which of the following instruments is not a wind instrument?
A
clarinet
B
saxophone
C
trumpet
D
xylophone
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 #34087)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Solution
Three capacitors each of capacitance 18\(\mu F\) are connected in series. Calculate the effective capacitance of the capacitors
A
54.00\(\mu F\)
B
18.00\(\mu F\)
C
6.00\(\mu F\)
D
0.17\(\mu F\)
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(\frac{1}{c} = \frac{1}{18} + \frac{1}{18} + \frac{1}{18} = \frac{3}{18}\)
c = 6\(\mu F\)
Source: Myschool Past Questions Archive (Record #34097)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
Solution
The magnitude of the gravitational attraction between the earth and a particle is 40N. If the mass of the particle is 4kg. Calculate the magnitude of the gravitational field intensity of the earth on the particle
A
10.0N kg-1
B
12.6N kg-1
C
25.0N kg-1
D
160.0N kg-1
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
g = \(\frac{f}{m} = \frac{40}{4} = 10N kg^{-1}\)
Source: Myschool Past Questions Archive (Record #34102)
Physics
WAEC / WASSCE 2002
Heat Energy & Temperature
The lead-acid accumulator consists of a
A
lead as the positive electrode
B
lead ocide as the negative electrode
C
hydrochloric acid as the electrolyte
D
tetraoxosulphate(VI) acid as the electrolyte
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 #34104)