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Physics
WAEC / WASSCE 2003
Temperature, Thermometry & Thermal Expansion
The speed of sound in air is is directly proportional to
A
its temperature on the celsius scale
B
ite temperature in the thermodynamic scale
C
the cube root of its temperature on its celcius csale
D
the square roor of its temperature on the absolute scale
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 #34224)
Physics
WAEC / WASSCE 2003
Waves, Sound & Vibrations
Solution
A sonometer wire of linear density 0.08kg m-1 subjected to a tension of 800N is plucked. Calculate the speed of a pulse which moves from one end of the wire to the other
A
179.0ms-1
B
100.0ms-1
C
15.8ms-1
D
8.0ms-1
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
v = \(\sqrt{\frac{T}{m}} = \sqrt{\frac{800}{0.08}} = 100\)m/s
Source: Myschool Past Questions Archive (Record #34225)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Which of the following instruments gives a pure note when sounded?
A
talking drum
B
siren
C
tunning fork
D
guitar
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 #34226)
Physics
WAEC / WASSCE 2003
Electrostatics & Capacitors
Which of the following features of an electrostatic line of force is not correct?
A
it is an imaginary line which a positive charge will describe if it is free to move
B
the tangent drawn at any point on a curved line of force shows the direction of the electric field intensity at that point
C
it is sometimes curved
D
it can cross another line of force in a region of intense electric field
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 #34227)
Physics
WAEC / WASSCE 2003
Magnetism, Electromagnetism & AC Circuits
Which of the following statement about force is correct ?
A
electrostatic, gravitational and magnetic forces are always attractive
B
electric, gravitational and magnetic field obeys inverse square law
C
fields are real but their corresponding field lines are imaginary
D
field lines and their corresponding fields are both real
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 #34228)
Physics
WAEC / WASSCE 2003
Electrostatics & Capacitors
Solution
A positively charged glass rod is placed by near the cap of a positively charge electroscope. The divergence of the leaf is observed to
A
decrease
B
increase
C
remain the same
D
increase and collapse immediately
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
One of the uses of the Gold leaf electroscope is to test charges whether the charge is positive or negative. The gold-leaf electroscope tests the sign of the charge of an object. If an unknown charge is brought near to a charged electroscope and the leaf diverges more, the unknown charge is similar to the charge on the electroscope and vice versa.
Source: Myschool Past Questions Archive (Record #34229)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Solution
Two identical cells each of e.m.f 2v and internal resistance 1.0\(\Omega\) are connected in parallel. The combination is connected to an external load of 1.5\(\Omega\). Calculate the current in the circuit
A
0.57A
B
1.00A
C
1.14A
D
2.00A
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
I = \(\frac{E}{R + r} = \frac{2}{1.5 + 0.5}\)
= 1A
Source: Myschool Past Questions Archive (Record #34230)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Which of the following factors does not affect the the electric resistance of a wire?
A
length
B
mass
C
temperature
D
cross sectional area
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 #34231)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Solution
A current of 10A passes through a conductor for 10s, calculate the charge flowing through the conductor
A
100.0C
B
10.0C
C
1.0C
D
0.1C
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Q = it
= 10 x 10 = 100C
Source: Myschool Past Questions Archive (Record #34232)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Solution
A lamp is rated 240V 60W, calculate the resistance of its filament
A
240\(\Omega\)
B
360\(\Omega\)
C
960\(\Omega\)
D
1440\(\Omega\)
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
R = \(\frac{V^2}{P} = \frac{240^2}{60} = 960\Omega\)
Source: Myschool Past Questions Archive (Record #34233)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Solution
The maximum power dissipated by a 100\(\Omega\) resistor in a circuit is 4W. Calculate the voltage across the resistor
A
10V
B
20V
C
25V
D
400V
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
\(V^2 = PR = V = \sqrt{4} \times 100\)
= 20V
Source: Myschool Past Questions Archive (Record #34234)
Physics
WAEC / WASSCE 2003
Magnetism, Electromagnetism & AC Circuits
One difference between a reactance and a resistance in an alternating current circuit is
A
resistance is larger than reactance
B
energy is not diaaipated in a reactance
C
energy is stored in a resistance but not in a reactance
D
the current in a reactance is lower than in the resistance
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 #34235)
Physics
WAEC / WASSCE 2003
Magnetism, Electromagnetism & AC Circuits
Solution
Which of the following statements about an electromagnet is not correct?
A
it is a temporary magnet
B
its strength depends on the current
C
its stength depends on the number of turns in its coil
D
it has permanent poles
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
properties of an electromagnet include, 1) its strength depends on current and the number of turns in the coil,2) it is temporary, 3)it does not have permanent poles, and 4) its direction of flow is determined by the direction of current flowing through the coil.
Source: Myschool Past Questions Archive (Record #34237)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Which of the following statements is not true of the isotopes of an element? They
A
are atoms of the same element
B
have the same chemical properties
C
have the same atomic number
D
have the same mass number
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 #34238)
Physics
WAEC / WASSCE 2003
Current Electricity & Electric Circuits
Which of the following statements is true of ultra violet radiations? It
A
supports the sensation of hearing
B
does not cause the emission of electrons from metals
C
is an electromagnetic wave
D
is not capable of causing sun burns
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 #34239)