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Physics
NECO SSCE 2002
Mechanics and Properties of Matter
A block of ice of mass 10kg at 0°C absorbs heat energy from its surroundings and changes to water at the same temperature. The heat absorbed is referred to as
A
heat capacity
B
latent heat
C
specific heat
D
specific heat capacity
E
specific latent heat.
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 #42872)
Physics
NECO SSCE 2002
Mechanics and Properties of Matter
Solution
A body executing a simple harmonic motion has an angular velocity of 22 radians per second. If it has a maximum displacement of 10cm, what is its linear velocity?
A
1100ms-1
B
440 ms-1
C
220 ms-1
D
22 ms-1
E
2.2ms-1
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
Amplitude[r] =10cm =0.1m.
Angular velocity[w] =22 radians per second
Linear velocity=wr
V=22\times0.1
V=2.2m/s
Source: Myschool Past Questions Archive (Record #42873)
Physics
NECO SSCE 2002
Heat Energy & Temperature
In which simple machine is the effort applied between the load and the fulcrum?
A
claw hammer
B
nut crackers
C
pliers
D
sugar tongs
E
wheelbarrow
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 #42874)
Physics
NECO SSCE 2002
Heat Energy & Temperature
A body of weight 20N displaces 12N of the liquid in which it is immersed. What is the upthrust of the liquid on the body?
A
240N
B
32N
C
20N
D
12N
E
8N
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 #42875)
Physics
NECO SSCE 2002
Thermal Physics
Solution
If the temperature of a resistance wire is gradually increased, its resistance will
A
decrease gradually
B
first increase and then decrease
C
first increase and then remain the same
D
increase gradually
E
remain the same
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
In a metallic resistance wire (a conductor), as the temperature increases, the atoms vibrate more, causing more collisions with the free electrons. This increases the wire's resistance to the flow of current.
Source: Myschool Past Questions Archive (Record #42876)
Physics
NECO SSCE 2002
Waves and Optics
Solution
If the size of the hole of a pinhole camera is increased, the image formed becomes
A
brighter and blurred
B
brighter and larger
C
brighter and sharper
D
blurred and duller
E
blurred and larger
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
If the size of the hole in a pinhole camera is increased, the image formed becomes blurred and larger. This happens because a larger hole allows more light to enter, creating a larger image. However, the increased size also causes a wider range of rays from different points to converge, resulting in a loss of sharpness and a blurred image. Thus, the image is both larger and blurrier.
Source: Myschool Past Questions Archive (Record #42877)
Physics
NECO SSCE 2002
Waves and Optics
A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms-1]
A
1320m
B
660m
C
400m
D
330m
E
165m
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 #42878)
Physics
NECO SSCE 2002
Electricity and Magnetism
Solution
A negatively charged rod is brought near the cap of an electroscope. The cap is earthed momentarily while the charge is near to it. The rod is then removed. Which statement is correct?
A
The cap will be positively charged and the leaf will be negatively charged
B
The cap will be negatively charged and the leaf will be positively changed
C
The cap and the leaf will be positively charged
D
The cap and the leaf will be negatively charged
E
none
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
When a negatively charged rod is brought near an electroscope, it repels electrons, making the cap positively charged and the leaves negatively charged. If the cap is earthed while the rod is near, electrons flow in, neutralizing some positive charge and making the cap negatively charged. After removing the rod and disconnecting the earthing, the cap retains extra electrons and remains negatively charged, while the leaves may also be negatively charged depending on their electron loss. Thus, both the cap and the leaves are negatively charged.
Source: Myschool Past Questions Archive (Record #42879)
Physics
NECO SSCE 2002
Heat Energy & Temperature
If the refractive index of water is 1.33, what is the critical angle for a water-air boundary?
A
36.0 °
B
40.2 °
C
41.8 °
D
48.8 °
E
62.7 °
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 #42880)
Physics
NECO SSCE 2002
Heat Energy & Temperature
What does NOT affect the rate of evaporation of a liquid
A
exposed surface area of the liquid
B
humidity of the surroundings
C
nature of the liquid
D
temperature the liquid
E
volume of the liquid.
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 #42881)
Physics
NECO SSCE 2002
Electricity and Magnetism
The use of electrical fuses in domestic wiring is
A
to prevent and electrical shock
B
to supply electricity to all the electrical appliances
C
to allow electricity to flow easily through the mains to all the circuits
D
to cut off the mains supply it too high a current flows
E
to fuse all the circuit into one
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 #42882)
Physics
NECO SSCE 2002
Thermal Physics
Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?
A
Alpha rays
B
Gamma rays
C
Positive rays
D
Ultraviolet rays
E
X-rays
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 #42883)
Physics
NECO SSCE 2002
Mechanics and Properties of Matter
Solution
An object is projected with a velocity of 50ms-1 from ground level at an angle \theta to the vertical. If the total time of flight of the projectile is 5s, what is the value of \theta? (g = 10ms-2)
A
0°
B
30°
C
45°
D
60°
E
90°
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Time of flight =\( \frac{2Usin\theta}{g}\)
T = 5, g = 10m/s2
\(5 = \frac {2\times 50sin\theta}{10}\)
\(sin\theta =\frac {50}{100}\)
\(\theta = 30\)
vertical angle = 90 - 30 = 60^\circ
Source: Myschool Past Questions Archive (Record #42884)
Physics
NECO SSCE 2002
Heat Energy & Temperature
What is stored by a dry Leclanhé cell?
A
chemical energy
B
heat energy
C
mechanical energy
D
nuclear energy
E
solar energy
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 #42885)
Physics
NECO SSCE 2002
Electricity and Magnetism
Lenz’s law of electromagnetic induction states that
A
e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
B
the induced e.m.f. in a circuit is proportional to the rate of change f the number of lines of force linking the circuit
C
the induced current in a conductor is in such a direction as to oppose the change producing it
D
a force is exerted in a current-carrying conductor in a magnetic field.
E
the induced e.m.f. is proportional to the current producing the magnetic flux.
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 #42886)