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Physics
WAEC / WASSCE 2014
Waves and Optics
Solution
An object is placed in front of two plane mirrors inclined at 60o to each other. Determine the number of the images formed
A
2
B
3
C
5
D
7
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
n = \(\frac{360}{\theta}\) - 1
= \(\frac{360}{60} -1\)
= 6 - 1 = 5
Source: Myschool Past Questions Archive (Record #35768)
Physics
WAEC / WASSCE 2014
Heat Energy & Temperature
An ammeter can be adapted to measure potential difference by using a
A
shunt
B
multiplier
C
rheostat
D
resistance box
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 #35769)
Physics
WAEC / WASSCE 2014
Mechanics and Properties of Matter
The region around a magnet in which magnetic force can be expressed is known as
A
declination
B
flux density
C
field
D
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 #35770)
Physics
WAEC / WASSCE 2014
Waves and Optics
A transverse wave can be distinguished from a longitudinal wave by
A
diffraction
B
relection
C
refraction
D
polarization
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 #35761)
Physics
WAEC / WASSCE 2014
Waves and Optics
Solution
Refraction of lights differs from reflection in that, in refraction i. at least two media are involved ii. there is a change in the direction of the ray iii. the speed of the ray changes. Which of the statements above is/are correct?
A
i only
B
i ad ii only
C
ii and iii only
D
i and iii only
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
At least two media are involved: True for refraction.
There is a change in the direction of the ray: True for both refraction and reflection.
The speed of the ray changes: True only for refraction.
Source: Myschool Past Questions Archive (Record #35762)
Physics
WAEC / WASSCE 2014
Waves and Optics
Which of the following relations about the focal length fo of the objective and focal length fe of the eye piece of a compound is correct?
A
fo = fe
B
fo e
C
fo > fe
D
fe = 2fo
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 #35763)
Physics
WAEC / WASSCE 2014
Waves and Optics
The functional difference between a lens and a mirror is that a lens
A
reflects a beam of light while a mirror refracts it
B
refracts a beam of light while a mirror reflects it
C
absorbs incident rays while a mirror transmit them
D
transmits incidents ray whle a mirror absorbs them
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 #35764)
Physics
WAEC / WASSCE 2014
Waves and Optics
Diagram
The diagram above illustrates an electromagnetic wave travelling with speed 3.0 x 108ms-1. Calculate the wave length of the wave
Attached Figure / Diagram
A
0.05m
B
0.15m
C
0.16m
D
0.40m
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 #35765)
Physics
WAEC / WASSCE 2014
Waves and Optics
In an ac circuit when the supply voltage frequency is equal to the resonant frequency, the current
A
leads the supply voltge by 90o
B
lags behind the supply voltage by 90o
C
leads the supply voltage by 45o
D
is in phase with the supply voltage
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 #35771)
Physics
WAEC / WASSCE 2014
Mechanics and Properties of Matter
The energy stored in a simple cell is
A
electrical
B
nuclear
C
thermal
D
chemical
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 #35772)
Physics
WAEC / WASSCE 2014
Waves and Optics
Solution
Which of the following conditions occur at resonance in a series RLC circuit? i. Impedance equals resistance ii. Current is maximum iii. Reactance is maximum iv. Current and voltage are 90^\circ out of phase
A
i and ii only
B
i and iii only
C
i, ii and iii only
D
i, ii, iii and iv
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
conditions for the occurrence of resonance in a series RLC circuit are i) impedance is at minimum ie when inductive and capacitive reactances are equal ii) when current is maximum
Source: Myschool Past Questions Archive (Record #35773)
Physics
WAEC / WASSCE 2014
Electricity and Magnetism
An electric motor converts
A
electrical energy to mechanical energy
B
mechanical energy to electrical energy
C
mechanical energy to chemical energy
D
electrical energy to thermal 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 #35774)
Physics
WAEC / WASSCE 2014
Heat Energy & Temperature
Solution
A 15 \(\mu F\) capacitor is connected to a 240V, 50Hz ac. source. Calculate the reactance of the capacitance [\(\pi = 3.142\)]
A
16\(\Omega\)
B
68\(\Omega\)
C
106\(\Omega\)
D
212\(\Omega\)
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\(X_c = \frac{1}{2 \pi fc}\)
= 2 x 3.142 x 50 x 15 x 10-6
= 212.179\(\Omega\)
Source: Myschool Past Questions Archive (Record #35775)
Physics
WAEC / WASSCE 2014
Mechanics and Properties of Matter
The energy required to separate the nucleus in an atom completely is known as
A
mass defect of the atom
B
electron binding energy
C
excitation energy
D
nuclear binding energy
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 #35781)
Physics
WAEC / WASSCE 2014
Heat Energy & Temperature
Which of the following statements is the major advantage of nuclear fusion over nuclear fission?
A
nuclear fusion releases more energy
B
more neutrons are released in fusion than in fission
C
fussion does not release as much dangerous radiation as fission
D
fusion reactions occur more readily than fission
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 #35782)