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Physics WAEC / WASSCE 2007 Current Electricity & Electric Circuits
Which of the following surfaces will radiate heat energy best?
A
Red surface
B
white surface
C
black surface
D
yellow surface
medium Difficulty
Physics WAEC / WASSCE 2007 Temperature, Thermometry & Thermal Expansion
The ice and steam point on a mercury-in-glass thermometer are 10cm and 30cm respectively. Calculate the temperature in decree Celsius when the mercury meniscus is the 14cm mark
A
20oC
B
30oC
C
34oC
D
70oC
medium Difficulty
Physics WAEC / WASSCE 2007 Gas Laws & Heat Transfer
Which of the following statements distinguishes thermal conduction for convection? i. Conduction requires a material medium while convection does not ii. In convection, there is actual motion of hot material, while in conduction, molecules molecules vibrates faster about their mean positions iii. Conduction takes place in solids while convection takes place in fluids.
A
i and ii only
B
ii and iii only
C
i and iii only
D
i, ii and iii
medium Difficulty
Physics WAEC / WASSCE 2007 Atomic, Quantum, Nuclear Physics & Electronics
A cube made of metal of linear expansivity \(\alpha\) is heated through a temperature \(\theta\). If the initial volume of the cube is Vo, the correct expression for the increase in volume of the cube is
A
\(\frac{1}{3} \alpha V_o \theta\)
B
\(\frac{1}{2} \alpha V_o \theta\)
C
\(2 \alpha V_o \theta\)
D
\(3 \alpha V_o \theta\)
medium Difficulty
Physics WAEC / WASSCE 2007 Equilibrium of Forces, Moments & Flotation
A relative density bottle of volume 50cm3 is completely filled with a liquid at 30oC. It is then heated to 80oC such that 0.75cm3 of the liquid is expelled. Calculate the apparent cubic expansivity of the liquid.
A
0.00030k-1
B
0.00032k-1
C
0.01970k-1
D
0.02030k-1
medium Difficulty
Physics WAEC / WASSCE 2007 Waves, Sound & Vibrations
Which of the following phenomena is not a direct consequence of rectilinear propagation of light?
A
lunar and solar eclipses
B
images of objects in a pin hole camera
C
diffraction of light
D
shadows of opaque object
medium Difficulty
Physics WAEC / WASSCE 2007 Reflection, Refraction & Dispersion of Light
An object is placed 10cm in front of a plane mirror. If it is moved 8cm away father away from the mirror, determine the distance of the final image from the mirror
A
2cm
B
9cm
C
16cm
D
18cm
medium Difficulty
Physics WAEC / WASSCE 2007 Lenses & Optical Instruments
In which of the following piece of apparatus is the radius of curvature equal to twice the focal length?
A
converging lens
B
diverging lens
C
converging mirror
D
parabolic mirror
medium Difficulty
Physics WAEC / WASSCE 2007 Reflection, Refraction & Dispersion of Light
When an object is placed at the centre of curvature of a concave mirror, its image is formed at
A
the focus
B
infinity
C
the centre of curvature
D
a distance twice the radius of curvature
medium Difficulty
Physics WAEC / WASSCE 2007 Reflection, Refraction & Dispersion of Light
A rectangular glass prism of thickness d and absolute refractive index n is placed on a point object which is viewed vertically downward from above the prism. Which of the following expressions correctly defines the apparent upward displacement of the object?
A
\(\frac{d}{n}\)
B
dn
C
\(\frac{d}{n - 2}\)
D
\(\frac{d(n - 1)}{n}\)
medium Difficulty
Physics WAEC / WASSCE 2007 Calorimetry, Latent Heat & Change of State
A body of mass 200g and specific heat capacity 0.4Jg-1k-1 cools from 37oC to 31oC. Calculate the quantity of the heat released by the body.
A
4800J
B
1200J
C
480J
D
202J
medium Difficulty
Physics WAEC / WASSCE 2007 Elasticity, Density, Pressure & Fluids
According to the kinetic theory of gasses, which of the following property of a gas can be affected by the collision of the gas molecule with the walls of the container?
A
temperature
B
energy
C
viscosity
D
pressure
medium Difficulty
Physics WAEC / WASSCE 2007 Gas Laws & Heat Transfer
The pressure of a fixed mass of an ideal gas at 27^\circC is 3 pa. The gas is heated at a constant volume until its pressure is 5 pa. Determine the new temperature of the gas.
A
100oC
B
227oC
C
273oC
D
500oC
medium Difficulty
Physics WAEC / WASSCE 2007 Atomic, Quantum, Nuclear Physics & Electronics
Which of the following wave is electromagnetic?
A
x-rays
B
sound waves
C
water waves
D
tidal waves
medium Difficulty
Physics WAEC / WASSCE 2007 Current Electricity & Electric Circuits
The distance between two points P and Q, along a wave is 0.05m. If the wave length of the wave is 0.10m, determine the phase angle between P and Q in radians
A
0.1\(\pi\)
B
\(\pi\)
C
2\(\pi\)
D
10\(\pi\)
medium Difficulty
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