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Physics
WAEC / WASSCE 1994
Work, Energy, Power & Simple Machines
In which of the following simple machines is the effort applied between the load and the fulcrum?
A
Scissors
B
Pliers
C
Wheel barrow
D
Sugar tongs
E
Nutcrackers
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 #26244)
Physics
WAEC / WASSCE 1994
Temperature, Thermometry & Thermal Expansion
Solution
The ice and steam points on a mercury in glass thermometer are found to be 90mm apart. What temperature is recorded in degree Celsius when the length of the mercury thread is 33.6mm above the ice point mark?
A
33.6°C
B
35.0°C
C
37.3°C
D
52.7°C
E
62.7°C
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(\frac{x - 0}{100 - 0} = \frac{33.6 - 0}{90 - 0}\)
\(\frac{x}{100} = \frac{33.6}{90}\)
\(90x = 3360 \implies x = \frac{3360}{90}\)
= 37.3^\circC
Source: Myschool Past Questions Archive (Record #26245)
Physics
WAEC / WASSCE 1994
Current Electricity & Electric Circuits
Solution
A gas occupies a certain volume at 27°C. At what temperature will its volume be three times the original volume assuming that its pressure remains constant?
A
81°C
B
162°C
C
354°C
D
627°C
E
900°C
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\(\frac{V_{1}}{T_{1}}\) = \(\frac{V_{2}}{T_{2}}\) x \(\frac{V_{1}}{27+273}\) = \(\frac{3V_{1}}{T_{2}}\) , \(T_{2}\)= 900K; T=627°C
Source: Myschool Past Questions Archive (Record #26246)
Physics
WAEC / WASSCE 1994
Current Electricity & Electric Circuits
Solution
When two objects P and Q are supplied with the same quantity of heat,the temperature change in P is observed to be twice that in Q. If the masses of P and Q are the same,calculate the ratio of the specific heat capacities of P and Q
A
1:1
B
1:3
C
1:4
D
1:2
E
4:1
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\(MC_{p}\ \times 2\theta^2\ = mc\theta\ \times \theta\) ; \(\frac{C_{p}}{CQ}\) = \(\frac{m}{2mo}\)
Source: Myschool Past Questions Archive (Record #26247)
Physics
WAEC / WASSCE 1994
Elasticity, Density, Pressure & Fluids
The instrument used in the measurement of atmospheric pressure is?
A
Hydrometer
B
Ratemeter
C
Barometer
D
Photometer
E
Manometer
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 #26248)
Physics
WAEC / WASSCE 1994
Current Electricity & Electric Circuits
Solution
A tap supplies water at 30°C while another supplies at 86°C. If a man wishes to bath with water at 44°C, calculate the ratio of mass of hot water to that of cold water required
A
1:3
B
3:1
C
3:7
D
7:3
E
15:8
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
\(M_Hc\theta_{H} = M_cc\theta_c\)
\(M_h(86-44) = M_c(44-30)\) thus giving 1:3
Source: Myschool Past Questions Archive (Record #26249)
Physics
WAEC / WASSCE 1994
Calorimetry, Latent Heat & Change of State
A steam trap is a component of apparatus used in determining the specific latent heat of vaporization of steam. In the steady state, the steam trap
A
stores the steam for future use
B
prevents the steam from escaping
C
ensures that only dry steam gets into the calorimeter
D
allows condensed steam to go into the calorimeter
E
determines the quantity of steam used
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 #26250)
Physics
WAEC / WASSCE 1994
Calorimetry, Latent Heat & Change of State
A hygrometer is an instrument used to measure
A
Dew point
B
Temperature
C
Relative density
D
Relative humidity
E
Vapour pressure
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 #26251)
Physics
WAEC / WASSCE 1994
Reflection, Refraction & Dispersion of Light
The image of an object placed at the center of the curvature of a concave mirror is
A
Inverted and magnified
B
at the principal focus
C
real and diminshed
D
Erect and virtual
E
at the center of the curvature
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 #26252)
Physics
WAEC / WASSCE 1994
Lenses & Optical Instruments
A simple magnifying glass is used to view an object. At what distance from the lens must the object be placed so that an image 5 times the size of the object is produced 20cm from the lens?
A
2cm
B
4cm
C
15cm
D
25cm
E
100cm
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 #26253)
Physics
WAEC / WASSCE 1994
Lenses & Optical Instruments
The inability of the eye to focus near objects is known as
A
Long sight
B
Astigmatism
C
Presbyopia
D
Glaucoma
E
Short sight
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 #26254)
Physics
WAEC / WASSCE 1994
Waves, Sound & Vibrations
Solution
Which of the following are transverse waves? I. Ripples on water II. Sound waves in air III. Light waves from the sun?
A
II only
B
I only
C
II and III only
D
I and III only
E
I, II, and III.
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Transverse waves cause the medium to move perpendicular to the direction of the wave. Longitudinal waves cause the medium to move parallel to the direction of the wave.
Examples of Transverse waves are water waves, light waves, radio waves and string / rope waves.
Important example of Longitudnal waves is sound wave.
Source: Myschool Past Questions Archive (Record #26255)
Physics
WAEC / WASSCE 1994
Waves, Sound & Vibrations
Which of the following has the shortest wavelength?
A
Infrared rays
B
Gamma rays
C
Ultra violet rays
D
Radio waves
E
Visible light
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 #26256)
Physics
WAEC / WASSCE 1994
Current Electricity & Electric Circuits
The electrical energy supplied by a Leclanche cell is obtained from the
A
Nuclear energy
B
Magnetic energy
C
Solar energy
D
Chemical energy
E
Mechanical 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 #26257)
Physics
WAEC / WASSCE 1994
Current Electricity & Electric Circuits
Which of the following is not a part of an A.C generator?
A
Carbon brushes
B
Slip rings
C
Commutator
D
Field magnet
E
Armature
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 #26258)