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 2206–2220 of 5315 verified questions
Sort by:
Physics
NECO SSCE 2009
Elasticity, Density, Pressure & Fluids
Which of the following phenomena is responsible for the spherical shape of soap bubbles?
A
Adhesion
B
Capillarity
C
Cohesion
D
Osmosis
E
Surface tension
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 #43053)
Physics
NECO SSCE 2009
Waves, Sound & Vibrations
Solution
A plane progressive wave is represented by the equation y = 0.2sin (200\pit - 0.5.x) where x and y are measured in cm and t in s. What is the frequency of the wave?
A
0.5Hz
B
4.0Hz
C
10.0Hz
D
100.0Hz
E
200.0Hz
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Comparing y = 0.2sin (200\pit - 0.5.x) with the general equation of wave y = Asin(\omegat - kx)
\omega = 200\(\pi\)
But \omega = 2\(\pi\)f = 200\(\pi\)
f = \(\frac{200\pi}{2\pi}\) = 100Hz
Source: Myschool Past Questions Archive (Record #43054)
Physics
NECO SSCE 2009
Linear Motion, Projectiles & Kinematics
A stone is thrown with a speed of 10ms at an angle of 30° to the horizontal, Calculate its time of flight, (g = 10ms2)
A
0.5s
B
1.0s
C
1.7s
D
2.0s
E
3.4s
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 #43055)
Physics
NECO SSCE 2009
Current Electricity & Electric Circuits
Inertia is the property of a body which makes the body to
A
accelerate
B
be reluctant to move when at rest
C
experience friction when moving
D
move randomly
E
retard
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 #43057)
Physics
NECO SSCE 2009
Equilibrium of Forces, Moments & Flotation
The term torque means
A
the equilibrant of two concurrent forces
B
the moment of a force about an ads
C
the resultant of several forces acting on a body in equilibrium
D
two coplanar forces at right angle to each other
E
two equal and opposite forces whose lines of action do not coincide
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 #43058)
Physics
NECO SSCE 2009
Newton's Laws, Momentum & Collisions
Solution
A ball of mass 0.1kg moving with a velocity of 20ms-1 is hit by a force which acts on it for 0.02s. If the ball moves off in the opposite direction with a velocity of 25ms-1 , calculate the magnitude of the force.
A
25N
B
125N
C
225N
E
100N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Impulse = \(\Delta\) momentum
F x t = m(V\(_2\) - V\(_2\))
F = \(\frac{M(V_1 - V_2)}{t}\) = \(\frac{0.1(-25 - 20)}{0.02}\) = \(\frac{- 4.5}{0.02}\) = - 225N
Therefore, the force = 225N
Source: Myschool Past Questions Archive (Record #43059)
Physics
NECO SSCE 2009
Current Electricity & Electric Circuits
An object of mass 2kg moves for 5s with a uniform velocity of 10ms. What is the magnitude of its acceleration in ms-2
?
A
zero
B
2.5
C
10
D
12.5
E
100
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 #43060)
Physics
NECO SSCE 2009
Current Electricity & Electric Circuits
In the electrical method of making a magnet, the polar the magnet formed depends on the
A
amount of current passed
B
direction of the current
C
nature of the material used
D
orientation of the magnetic material in space
E
size of the magnetic material
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 #43061)
Physics
NECO SSCE 2009
Reflection, Refraction & Dispersion of Light
Two images Y and X are formed by a plane mirror and a convex mirror respectively. Which of the following is correct about their characteristics?
A
Both are inverted
B
The magnification of Y is greater than one while that of X is one
C
The magnification of Y is one while that of X is less than one
D
Y is inverted while X is erect
E
Y is real while X is virtual.
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 #43062)
Physics
NECO SSCE 2009
Work, Energy, Power & Simple Machines
Solution
The work done in extending a spring by 40 mm is 1.52J. Calculate the elastic constant of the spring.
A
38.8 Nm-1
B
60.8 Nm-1
C
190.0 Nm-1
D
1900.0 Nm-1
E
3800.0 Nm-1
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Force = Elastic constant x extension
Work done = \(\frac{1}{2} K \times e^2\)
Given Work done = 1.52J; Elastic constant (k) = ?; e = 40mm = 0.04 m
\(\therefore 1.52 = \frac{k \times (0.04)^2}{2}\)
\(3.04 = k \times 1.6 \times 10^{-3}\)
\(k = \frac{3.04}{1.6} \times 10^3\)
= 1.9 x 10\(^3\)
= 1900 Nm\(^{-1}\)
Source: Myschool Past Questions Archive (Record #43064)
Physics
NECO SSCE 2009
Elasticity, Density, Pressure & Fluids
Which of the following statements is correct about volatile liquids? They have
A
low boiling point
B
Low evaporating rate
C
high conductivity
D
high density
E
high viscosity
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 #43065)
Physics
NECO SSCE 2009
Magnetism, Electromagnetism & AC Circuits
A transformer has an efficiency of 92.5%. the ratio number of turns in the primary coil to that in the secondary coil is 128 : 45. If the current passing through the secondary coil is 9.0A, calculate the current passing through the primary-coil.
A
2.93A
B
3.16A
C
3.42A
D
25.60A
E
27.68A
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 #43066)
Physics
NECO SSCE 2009
Calorimetry, Latent Heat & Change of State
An immersion heater is rated 1500W. How long does it take the heater to raise the temperature of 1 kg of water by 30°C? (Assume heat lost to the surrounding is negligible, Specific heat capacity of water 4200Jkg-1K-1)
A
84s
B
112s
C
130s
D
168s
E
280s
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 #43068)
Physics
NECO SSCE 2009
Gas Laws & Heat Transfer
The equation PxVyTz = Constant is Charles’ law if
A
x = 0, y = 1 and z = -1
B
x = 0, y = -1 and z = 1
C
x = 1, y = 1 and z = 0
D
x = 1, y = 1 and z = -1
E
x = 1, y = 1 and z = 1
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 #43069)
Physics
NECO SSCE 2009
Current Electricity & Electric Circuits
Solution
When a resistor of resistance R is connected across a.c. the terminal p.d. of the cell is reduced to three-quarter its e.m.f. The cell’s internal resistance in terms of R is
A
\(\frac{R}{4}\)
B
\(\frac{R}{3}\)
C
\(\frac{R}{2}\)
D
2\(\frac{R}{3}\)
E
R
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Given that the terminal potential difference (p.d.) of the cell is reduced to three-quarters of its e.m.f. when a resistor \( R \) is connected, we can express this as:
\(V = \frac{3}{4} E\)
The relationship between terminal voltage \( V \), e.m.f. \( E \), internal resistance \( r \), and current \( I \) is given by:
\(V = E - Ir\)
The current \( I \) can be expressed as: \(I = \frac{V}{R}\)
Substituting for \( I \) in the voltage equation:
\(V = E - \left(\frac{V}{R}\right) r\)
Substituting \( V = \frac{3}{4} E \):
\(\frac{3}{4} E = E - \left(\frac{\frac{3}{4} E}{R}\right) r\)
Rearranging gives: \(\frac{3}{4} E = E - \frac{3Er}{4R}\)
Simplifying: \(\frac{3}{4} E - E = -\frac{3Er}{4R}\)
This leads to: \(-\frac{1}{4} E = -\frac{3Er}{4R}\)
Dividing both sides by \( -E \): \(\frac{1}{4} = \frac{3r}{4R}\)
Cross-multiplying results in: \(R = 3r\)
Finally, solving for \( r \): \(r = \frac{R}{3}\).
Source: Myschool Past Questions Archive (Record #43070)