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 15901–15915 of 29821 verified questions
Sort by:
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
Which of the following reasons explains why the walls and ceilings of a standard concert hall are usually covered with perforated pads? To
A
increase the intensity of sound waves
B
increases the loudness of the sound waves
C
reduce the effect of revibration of sound waves
D
decreases thr frequency of sound waves
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 #34370)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
The sound from a vibrating tuning sound is when the tip of its stem is placed on a wooden table than when in air because
A
the friction between the table and the tuning fork generates additional energy
B
air molecules obsorb sound wave but wood transmit sound waves
C
the table increases the frequency of the turning fork
D
a large mass of air is set into vibration by the table
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 #34383)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
Charges on a conductor are
A
evenly distributed over a surface of any shape
B
concentrate on the inner surface of the conductor
C
concentrate at the outer flat surface of the conductor
D
generally concentrated at sharply curved surface
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 #34387)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
Which of following functions is performed by manganese IV oxide in the Lenclanche cell?
A
control of local action
B
depolarisation of the cell
C
regulating current flow in the cell
D
reduction of the internal resistance of the cell
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 #34391)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
Solution
A car fuse marked 3A operates optimally on a 12V battery, calculate the resistance of the fuse
A
36.0\(\Omega\)
B
15.0\(\Omega\)
C
9.0\(\Omega\)
D
4.0\(\Omega\)
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
R = \(\frac{v}{I} = \frac{12}{3} = 4\Omega\)
Source: Myschool Past Questions Archive (Record #34393)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
Solution
Find the cost of running a 60W lamp for 24 hours. If 1kW hr cost 5 naira
A
14.4 naira
B
12.5 naira
C
7.2 naira
D
2.0 naira
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Cost = P(Kwh) x Cost per KW
= \(\frac{60 \times 24}{1000} \times N5 = N7.2\)
Source: Myschool Past Questions Archive (Record #34396)
Physics
WAEC / WASSCE 2004
Electrostatics & Capacitors
The quantity of electric charge stored in a capacitor is measured in
A
farad
B
ampere
C
coulomb
D
volt
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 #34397)
Physics
WAEC / WASSCE 2004
Electrostatics & Capacitors
Solution
Calculate the energy stored in a 20\(\mu F\) capacitor. If the p.d between the plates is 40V
A
3.2 x 10-2J
B
1.6 x 10-2J
C
8.0 x 10-4J
D
4.0 x 10-4J
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
W = \(\frac{cv^2}{2} = \frac{20 \times 10^{-6} \times 40^{2}}{2}\)
= 1.6 x 10-2J
Source: Myschool Past Questions Archive (Record #34400)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
Given that the gravitational constant is G. Newton's universal law of gravitation states that the force of attraction between two masses M1 and M2 separation by a distance r is
A
\(Gr^2 M_1M_2\)
B
\(Gr M_1M_2\)
C
\(\frac{GM_1 M_2}{r^2}\)
D
\(\frac{GM_1 M_2}{r}\)
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 #34401)
Physics
WAEC / WASSCE 2004
Electrostatics & Capacitors
Solution
A charge of 1.6 x 10-10C is placed in a uniform electric field of intensity 2.0 x 105 NC-1. calculate the magnitude of the electric force exerted on the change
A
3.2 x 105N
B
1.8 x 105N
C
3.2 x 10-5N
D
1.8 x 10-5N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
F = Exq = 2.0 x 105 x 1.6 x 10-10
= 3.2 x 10-5N
Source: Myschool Past Questions Archive (Record #34402)
Physics
WAEC / WASSCE 2004
Scalars, Vectors & Relative Motion
Which of the following statements is not correct?
A
a magnetic field is a region in which a magnetic force will be detected
B
a magnetic line of force is a path along which a magnetic fields are scalar quantities it were free
C
magnetic fields are scalar quantities
D
neutral point are obtained where the earth's magnetic force is exactly equal and opposite to that due to a magnet
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 #34403)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
The main function of the mouth piece of a telephone is that it converts sound energy to
A
mechanical energy
B
electrical energy
C
chemical energy
D
thermal energy
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 #34404)
Physics
WAEC / WASSCE 2004
Current Electricity & Electric Circuits
An atom is normally electrically neutral because the
A
number of electrons is equal to the number of protons
B
number of electrons is equal to the number of neutrons
C
number of protons is equal to the number of neutrons
D
electrons of the atom are buried deeply in the nucleus
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 #34405)
Physics
WAEC / WASSCE 2004
Atomic, Quantum, Nuclear Physics & Electronics
In which of the following devices is the principle of photoelectric effect not applicable?
A
close-circuit television camera
B
burglar alarm
C
solar cells
D
periscope
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 #34406)
Physics
WAEC / WASSCE 2004
Atomic, Quantum, Nuclear Physics & Electronics
Which of the following statements about X-rays is not correct? They
A
are electromagnetic waves
B
can be used to study crystal lattice
C
can destroy living cells
D
are produced from the nucleus of an atom
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 #34407)