WASSCE PHYSICS MAY/JUNE 2009 (SSCE WAEC MAY/JUNE 2009 PHYSICS))
1. In which of the of the following states of matter do he molecules vibrate about their mean positions?
A. liquids only
B. Solids only
C. Liquids and gases only
D. Solid, liquids and gases
2. Which of the following properties of a steel bar can be measured in terms of the dimension of length only?
A. Weight
B. Density
C. Pressure
D. Volume
3. In a hydraulic press, a force of 40N is applied to a smaller piston of area 10cm2. If the area of the larger piston is 200cm2, calculate the force obtained
A. 800N
B. 500N
C. 80N
D. 50N
4. A body of volume 0.046 m3 immersed in a liquid of density 980kgm–3with ¾ of its volume submerged. Calculate the upthrust on the body. [g =10m/s–2 ]
A. 11.27N
B. 33.81 N
C. 112.70N
D. 339.10N
5. Which of the following types of motion will be produced when a pair of equal and opposite non-collinear parallel forces acts on a body
A. Vibrational motion
B. Random motion
C. Translational motion
D. Rotational motion
6. A body moving in a circle at constant speed has
I. a velocity tangential to the circle
II. a constant kinetic energy
III. an acceleration directed towards the circumference of the circle
Which of the statement above are correct
A. I and II only
B. II and III only
C. I and III only
D. I, II and III
7. A car moves with a speed of 30ms–1. Calculate the distance travelled in 30s
A. 30m
B. 60m
C. 450m
D. 900m
8. A moving body accelerates when it
A. changes its direction at constant speed
B. maintains a constant linear speed
C> covers equal distance in equal times in a straight line
D. is acted upon by balanced forces
9. The following properties of a solid are measured on earth:
I. weight
II. Specific heat capacity
III density
Which of the properties will have different value if measured in space?
A. I only
B. II only
C. III only
D. II and III only
10. Which of the vector diagram below represents the following position vectors
$\overrightarrow{{{\nabla }_{1}}}=\left( \begin{align}
& 1 \\
& 1 \\
\end{align} \right),\text{ }\overrightarrow{{{\nabla }_{2}}}=\left( \begin{align}
& 2 \\
& 1 \\
\end{align} \right),\overrightarrow{{{\nabla }_{3}}}=\left( \begin{align}
& 2 \\
& -2 \\
\end{align} \right)\text{ and }\overrightarrow{{{\nabla }_{4}}}=\left( \begin{align}
& 1 \\
& -2 \\
\end{align} \right)$
11. Two force 6N and 8N acts eastwards and northwards respectively on a body. Calculate the magnitude of their equilibrant
A. 2N
B.. 7N
C. 10N
D. 14N
12. The period of a simple pendulum of length 80.0cm was found to have doubled when the length of the pendulum was increased by X. Calculate X
A. 26.7 cm
B. 40.0cm
C. 160.0cm
D. 240.0cm
13. A body of mass 5kg moving with a velocity of 30ms–1 due east is suddenly hit by another body and changes its velocity to 50ms–1 in the same direction. Calculate the magnitude of the impulse received
A.100Ns
B. 150Ns
C. 250Ns
D. 400Ns
14. Electrical energy is measured in
A. ampere
B. Coulomb
C. Kilowatt-hour
D. kilowatt
15. A stone of mass 0.5kg is dropped from a height of 12m.Calculate its maximum kinetic energy? [g=10ms–1]
A. 3.0J
B. 6.0J
C. 30.0J
D. 60.0 J
16.A machine of efficiency 80% is used to lift a box. If the force applied by the machine is twice the weight of the box . What is the velocity ratio of the machine
A. 0.50
B. 0.63
C. 0.80
D. 1.60
17. A faulty thermometer registers 102.5o at 100oC. If the thermometer has no zero error, what will it register@@@@@@@@@@@@@@@@@@
A. 54.6oC
B 55.0oC
C. 56.0oC
D. 56.4oC
18. A rod of initial length 2m at a temperature of 25-C is heated to 60oC. Calculate the increase in length of the rod if its linear expansivity is 4.0x 10–3K–1
A. 0.26m
B. 0.44m
C. 0.53m
D. 0.84m
19. As a bicycle tyre was being pumped up, it was noticed that contrary to Boyle’s law the volume increased as the pressure increased, The best explanation of this is that Boyle’s law is only true for
A. Ideal gas
B. is fixed mass of gas
C. a mixture of gases
D, a gas at variable temperature
20. It takes 4 minutes to boil a quantity of water using an electrical heating coil, How long will it take to the boil the same quantity of water with same heating if current is doubled?
Neglect any external heat losses
A, 8 minutes
B. 4 minutes
C. 2 minutes
D. 1 minutes
21. When table salt is added to ice, the melting point of ice
A. is raised
B. is lowered
C. remains constant
D. is first raised, then lowered
22. Which of the following factors affect the rate of evaporation of a liquid
I. Exposed surface area
II. Temperature of the surrounding
III Thermal capacity of the liquid
IV. Relative humidity of the surroundings
A. II and III only
B. II, III and IV only
C. I, III and IV only
D. I, II and IV only
23. Which of the following instruments is used to measure relative humidity?
A. Hydrometer
B. Barometer
C. Hypsometer
D. Hygrometer
24. The maximum displacement of a vibrating tuning fork is its
A. amplitude
B frequency
C. period
D. wavelength
25. A boat is rocked by waves of speed 30ms–1 whose successive crests are 10m apart. Calculate the rate at which boat receives the waves
A. 30 s–1
B. 10s–1
C. 3s–1
D. 1s–1
26. Which of the following waves is not transverse?
A. Light waves
B. Sound waves
C. Sea waves
D. Radio waves
27. Light travelling through a small pin hole usually does not make a shadow with a distinct sharp edge because of
A. diffraction
B. Interference
C. reflection
D. Refraction
28.The angle of incidence of a ray of light on a plane mirror is 55o.Determine the angle between the reflected ray and the mirror
A. 25o
B. 45o
C. 55o
D. 110o
29. The concave mirror forms a magnified and erect image only when the object is placed
A. at the centre of curvature
B. at the focus
C. between the focus and the pole of the mirror
D. beyond the radius of curvature
30. A thin len is placed 50cm from illuminated object. The image produced has linear magnification of 1/4 . Calculate the power of the lens in dioptres
A.2.5D
B. 5.0D
C. 10.0D
D. 25.0D
31.Which of the following characteristics of light determines its colours
A. velocity
B. Wavelength
C. Amplitude
D. Intensity
32. Which of the following is not part of the electromagnetic spectrum?
A. X–rays
B. Microwaves
C. Infrared radiation
D. Alpha rays
33. Sound interference is necessary to produce the phenomenon of
A. beats
B. Doppler effect
C. acoustic resonance
D. echo
34. A satellite in circular motion around the earth does not have
A. gravitational force acting on it
B. a uniform velocity
C. an acceleration
D. a centripetal force
35. When a conductor mounted on an insulating stand is charged and left for sometime, the conductor eventually loses all its charges. This is because the
A. electric charges evaporated from the surface of the conductor
B. Charges are conducted to earth
C. Charges on the conductor are neutralized by opposite charges from surrounding air
D. Charges ionize the surrounding air
Use the information below to answer question 35 and 37
An isolated metal sphere of radius R, carrying an electric charge, Q is situated in a medium of relative permittivity εr. A test charge is placed at point P, distance r from the surface of the sphere. Let εo represent the permittivity of free space.
36 The electric potential at P is given by the expression
A.$\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}r}$ .
B.$\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}(R+r)}$
C. $\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}(R-r)}$
D. $\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}R}$
37.The magnitude of the electric field intensity at P is given by the expression
A.$\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}{{r}^{2}}}$
B. $\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}{{(R+r)}^{2}}}$
C. $\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}{{(R-r)}^{2}}}$
D.$\frac{Q}{4\pi {{\varepsilon }_{o}}{{\varepsilon }_{r}}{{R}^{2}}}$
38. A resistor of resistance R is connected to a battery of negligible internal resistance. If a similar resistor is connected in series with it the
A. effective resistance of the circuit is halved
B. total power dissipated is doubled
C. total current in the circuit
D. terminal voltage is halved
39. A cell of e.m.f 1.5V is connected in series with a resistor of resistance of 3.0Ω. A voltmeter connected across the cell register 0.9V. Calculate the internal resistance of the cell
A. 2.00Ω
B. 3.00Ω
C..5.00 Ω
D.6.0Ω
40. A wire of resistivity 4.40×10–5 Ωcm has a cross sectional area of 7.50 ×10–4cm2. Calculate the length of this wire that will be required to make a 4.0 Ω resistor
A. 82.50cm
B. 68.18cm
C. 15.90cm
D. 11.94cm
41. A battery of e.m.f 12.0V and internal resistance 0.5 Ω is connected to 1.5 Ω and 4.0 Ω series resistors. Calculate the terminal voltage of the battery
A. 13.0V
B.11.0V
C. 3.0V
D. 1.0V
42. If the direction of the current in a straight cwire is reversed, the magnetic field
A. remains the same
B. becomes parallel to the wire
C. Ceases to exist
D. is oppositely directed
43.An ideal step – down transformer steps up
A. power
B. energy
C. current
D. voltage
44. An inductor of inductance 1.0H is connected in series with a capacitor of capacitance 2.0µF in a.c..circuit to resonate
A. 112.5Hz
B. 225.0Hz
C. 352.5Hz
D. 707.1Hz
45. An ammeter connected to an a.c. circuit records 5.5A. The peak currecnt in the circuit is
A. 7.8A
B. 7.1A
C. 3.9A
D. 3.5A
The table below show the enrgy distribution for various level of an atom. Use it to answer question 46 and 47
|
Energy level (n) |
1 |
2 |
3 |
4 |
|
Energy (ev) |
–13.6 |
–3.39 |
–1.51 |
–0.85 |
[h =6.6 ×10–34Js; e = 1.6 × 10–19C, c = 3.0 ×108ms–1]
46. Calculate the first excitation energy of the atom
A. 1.60 ×10–19J
B.1.02 × 10–12J
C. 1.60× 10–18J
D. 1.02×10J
47.If the atom de-excites from n = 2, the wavelength of the emitted radiation is
A. 2.4×10–1m
B. 1.2×10–7m
C. 2.4×10–9m
D. 1.2×10–9m
49.The main difference between x-rays and y-rays lies in their
A. ionizing ability
B. absorption rate
C. mode of production
D. mode of propagation
50. An electron of mass 9.1×10–31kg moves with a speed of 107ms–1. Calculate the wavelength of the associated wave [h = 6.6×10–34Js]
A. 9.10×10–24m
B. 4.55×10–17m
C. 7.25×10–11m
D. 6.20×10–8m