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Physics
WAEC / WASSCE 2016
Current Electricity & Electric Circuits
Solution
At a birthday party, the celebrant pops a corked fruit wine. If the cork shoots out of the bottle at an angle of 40o to the horizontal and travels a horizontal distance of 4.50m in 1.25s. Calculate the initial speed of the cork.
A
4.2ms-1
B
4.7ms-1
C
5.6ms-1
D
7.1ms-1
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
R = Ucos\(\theta\) x t
U = \(\frac{R}{Cos \theta \times t}\)
= \(\frac{4.50}{Cos40N.25}\)
= 4.699m/s
Source: Myschool Past Questions Archive (Record #45590)
Physics
WAEC / WASSCE 2016
Equilibrium of Forces, Moments & Flotation
Solution
A uniform metre rule is balanced on a fulcrum placed at the 35cm mark by suspending a mass of 120g at the 10cm mark. Calculate the mass of the metre rule.
A
60g
B
80g
C
120g
D
200g
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Clock-wise moment = Anti-clock wise
Hence 120 \times (35−10)= Xg \times(50−35)
120 \times 25 = Xg \times 15
Xg = 200g
Source: Myschool Past Questions Archive (Record #45593)
Physics
WAEC / WASSCE 2016
Current Electricity & Electric Circuits
Diagram
A plank is placed along the path on which a wheel barrow containing sand is pushed at a construction site to prevent it from sticking as illustrated in the diagram given. The large area of the plank prevents the wheel barrow from getting stuck by
Attached Figure / Diagram
A
increasing the reaction on the ground
B
increasing the pressure on the ground
C
decreasing the pressure on the ground
D
decreasing the weight on the ground
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 #45596)
Physics
WAEC / WASSCE 2016
Temperature, Thermometry & Thermal Expansion
Diagram
Solution
The diagram given is used to determine the
Attached Figure / Diagram
A
boiling point of water
B
atmospheric pressure
C
upper fixed point of a thermometer
D
amount of water in the atmosphere
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
This setup typically shows a thermometer immersed in boiling water, which is used to calibrate the upper fixed point of the thermometer.
Source: Myschool Past Questions Archive (Record #45612)
Physics
WAEC / WASSCE 2016
Atomic, Quantum, Nuclear Physics & Electronics
Solution
An aluminium rod of length 1.8m at 10^\circC is heated to proceed produce a difference in length of 0.007m. Calculate the temperature to which it is heated. (Linear expansivity of aluminium = 2.3 x 10\(^{-5}\)K\(^{-1}\)
A
155oC
B
160oC
C
169oC
D
179oC
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\(\alpha = \frac{L_2 - L_1}{L_1(\theta_2 - \theta_1)}\)
L\(_2\) - L\(_1\) = \(\alpha L_1 (\theta_2 - \theta_1)\)
\(\theta_2 = \frac{0.007}{2.3 \times 10^{-5} \times 1.8}\) + 10
= 179^\circC
Source: Myschool Past Questions Archive (Record #45613)
Physics
WAEC / WASSCE 2016
Temperature, Thermometry & Thermal Expansion
A mercury-in-glass thermometer read 4cm at ice point and 29cm at steam point. Calculate the temperature when the mercury level is at 9cm
A
13oC
B
20oC
C
33oC
D
38oC
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 #45614)
Physics
WAEC / WASSCE 2016
Calorimetry, Latent Heat & Change of State
The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures
A
continuous dissipation of heat to the room
B
uniform distribution of thermal energy to all parts of the mixture
C
that the thermal energy is confined to the mixture
D
that there is rapid heat exchange
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 #45615)
Physics
WAEC / WASSCE 2016
Current Electricity & Electric Circuits
Which of the following statements is correct about the effect of dissolved salt on the freezing point of water?
A
the freezing point is lowered
B
the freezing point is increased
C
there is no change in the freezing point
D
the change in the freezing point depends on the temperature of the surrounding
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 #45623)
Physics
WAEC / WASSCE 2016
Current Electricity & Electric Circuits
A pressurized perfume bottle is left on the window pane of a room. What happens to he gas molecules of the perfume on a sunny day? They
A
expand
B
collide less often
C
move more rapidly
D
contract
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 #45626)
Physics
WAEC / WASSCE 2016
Waves, Sound & Vibrations
Given that v, f and \(\lambda\) are the velocity, frequency and wavelength of a wave respectively. Which of the following equations is correct?
A
v = f2\(\lambda\)
B
f = \(\frac{v}{\lambda}\)
C
f = \(\frac{v}{\lambda^2}\)
D
\(\lambda = \frac{f}{v^2}\)
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 #45638)
Physics
WAEC / WASSCE 2016
Waves, Sound & Vibrations
Solution
The distance between two successive trough of a wave is 0.4m. If the frequency of the source is 825Hz, Calculate the speed of the wave
A
165.0 ms-1
B
330.0ms-1
C
41.5ms-1
D
85.0ms-1
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
v = f\(\lambda\)
= 825 x 0.4
= 330.0ms-1
Source: Myschool Past Questions Archive (Record #45639)
Physics
WAEC / WASSCE 2016
Atomic, Quantum, Nuclear Physics & Electronics
Diagram
X-rays and infrared rays are both electromagnetic. Which common property do the waves have? Both waves
Attached Figure / Diagram
A
are longitudinal
B
have same frequency
C
have the same wavelength
D
travel at the same speed in a vacuum
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 #45640)
Physics
WAEC / WASSCE 2016
Reflection, Refraction & Dispersion of Light
The image formed by a concave mirror is real, inverted and magnified, when object is placed
A
at the focus
B
at the centre of curvature
C
beyond the centre of curvature
D
between the centre of curvature and the focus
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 #45641)
Physics
WAEC / WASSCE 2016
Reflection, Refraction & Dispersion of Light
Total internal reflection. i. is a phenomenon of refraction of light. ii. occurs when light rays travel into a denser medium. iii. occurs when the critical angle is just exceeded. iv. is a phenomenon of reflection of light. Which of the statements above are correct?
A
i and ii only
B
i and iii only
C
i, ii and iii only
D
i, iii and iv only
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 #45642)
Physics
WAEC / WASSCE 2016
Reflection, Refraction & Dispersion of Light
Complementary colours are those which
A
have the same refractive index
B
have the same wavelength
C
add-up to produce black light
D
add-up to produce white light
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 #45643)