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Physics
NECO SSCE 2002
Heat Energy & Temperature
Which process will increase the rate of oscillation of a pendulum?
A
decreasing the amplitude of oscillation of the pendulum
B
decreasing the length of the pendulum
C
decreasing the mass of the pendulum
D
increasing the length of the pendulum
E
increasing the mass of the pendulum.
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 #42887)
Physics
NECO SSCE 2002
Heat Energy & Temperature
Solution
An object weighing 0.60N is hung on a spiral spring and caused it to extend by 6.0cm. The object is removed and a black of wood replacing it causes the spring to extend by 10.0cm. What is the weight of the block of wood?
A
0.10N
B
0.36N
C
0.80N
D
1.00N
E
3.60N
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
From Hooke's law... F = ke
From the first statement
0.6 = k x 0.06
k = \(\frac{0.6}{0.06}\) = 10N/m
From second statement
F = weight of the block = ke
F = 10 x 0.1 = 1.0N
NOTE: Extension (cm → m)
Source: Myschool Past Questions Archive (Record #42889)
Physics
NECO SSCE 2002
Mechanics and Properties of Matter
A body is uniformly accelerated from rest. Which of the following quantities vary/varies linearly with the square of the time?
I. Displacement
II. Velocity
III. Momentum
A
I only
B
II only
C
III only
D
I and II only
E
II and Ill only
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 #42890)
Physics
NECO SSCE 2002
Thermal Physics
A short response time is obtained in a liquid-in-glass thermometer when the
A
bulb is large and thick-walled
B
bulb is small and thick-walled
C
stem is long and thin
D
liquid is of high density and the bulb is large
E
bulb is thin-walled and the liquid is a good conductor of heat.
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 #42891)
Physics
NECO SSCE 2002
Mechanics and Properties of Matter
A body of mass M1 moving with a velocity U collides with a stationary body of mass M2 and both move with a common velocity V. If linear momentum is conserved, which expression correctly represents V?
A
M1 + M2 ÷ M1U
B
M2U ÷ M1 – M2
C
M1U ÷ M1 – M2
D
M1U ÷ M1+ M2
E
M2U ÷ M1 + M2
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 #42892)
Physics
NECO SSCE 2002
Thermal Physics
According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased?
A
a decrease in the mean speed kinetic energy of the molecules
B
an increase in the mean speed of the molecules
C
an increase in the momentum change at each collision.
D
an increase in the number of collisions per second
E
an increase in the pressure exerted by the gas.
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 #42893)
Physics
NECO SSCE 2002
Waves and Optics
The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti-node?
A
6.0cm
B
9.0cm
C
18.0cm
D
360cm
E
72.0cm
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 #42894)
Physics
NECO SSCE 2002
Heat Energy & Temperature
An a.c. generator can be converted into a d.c. generator by replacing
A
the slip rings with split-ring commutators
B
the slip rings with armatures
C
the split-rings with slip rings
D
the split-rings with brushes
E
the brushes with slip-ring commutators.
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 #42895)
Physics
NECO SSCE 2002
Mechanics and Properties of Matter
It is NOT possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the
A
Crompton effect
B
de Broglie’s laws
C
Frank-Hertz experimental law
D
Heisenberg’s uncertainly principle
E
wave-particle paradox
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 #42896)
Physics
NECO SSCE 2002
Mechanics and Properties of Matter
Solution
An air bubble of volume 4cm\(^3\) is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10m of water?
A
2cm3
B
4cm3
C
6cm3
D
8cm3
E
12cm3
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
The bubble is formed 20 m below the surface.
Pressure at that depth = atmospheric pressure + water pressure due to 20 m of water.
Given:
Atmospheric pressure = pressure of 10 m of water
Therefore,
P\(_1 = 20 + 10 = 30 \text{ m of water}\)
Just below the surface, the bubble is under atmospheric pressure only:
P\(_2 = 10 \text{ m of water}\)
Apply Boyle's Law
Given:
V\(_1 = 4\ \text{cm}^3\)
P\(_1V_1 = P_2V_2\)
30\(\times 4 = 10 \times V_2\)
V\(_2 = \frac{30 \times 4}{10}\)
V\(_2 = 12\ \text{cm}^3\)
The volume of the air bubble just below the water surface is 12 cm\(^3\).
Source: Myschool Past Questions Archive (Record #42897)
Physics
NECO SSCE 2002
Thermal Physics
Solution
A platinum-resistance thermometer has a resistance of 10 \omega at 0^\circC and 18 \omega at 100^\circC. Assuming that resistance changes uniformly with temperature, what is the resistance of the thermometer when the temperature is 45^\circC?
A
27.8
B
17.8
C
13.6
D
6.4
E
3.6
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
18\omega ⇔ 100ºC
x ⇔ 45ºC
10\omega ⇔ 0ºC
\(\frac{ x - 10}{18 - 10} = \frac{ 45 - 0}{ 100 - 0}\)
100x - 1000 = 45 x 8
100x = 360 + 1000 = 1360
x = \(\frac{1360}{100}\) = 13.6.
Source: Myschool Past Questions Archive (Record #42898)
Physics
NECO SSCE 2002
Heat Energy & Temperature
The silvered walls of a vacuum flask minimise loss of heat due to
A
conduction and convection
B
conduction only
C
convection and radiation
D
convection only
E
radiation 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 #42899)
Physics
NECO SSCE 2002
Electricity and Magnetism
The phenomenon of photoelectric effect is NOT used in
A
automatic doors
B
bimetallic strip thermometers
C
light meters in cameras
D
setting off burglar alarms
E
sound production from film tracks.
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 #42900)
Physics
NECO SSCE 2002
Heat Energy & Temperature
Which of the following is a percussion instrument?
A
bell
B
flute
C
guitar
D
piano
E
organ
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 #42901)
Physics
NECO SSCE 2002
Waves and Optics
A transformer supplies 12V when connected to a 240V mains. If the transformer takes 0.120A from the mains when used to light a 12V, 24W lamp, what is its efficiency?
A
57.20%
B
66.60%
C
83.30%
D
92.50%
E
100%
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 #42902)