WASSCE PHYSICS MAY/JUNE 2015 (SSCE WAEC MAY/JUNE 2015 PHYSICS

1. Which of the following statements about mass and weight are correct?
I. Weight is the force of gravity on a body

II. The mass of a body is the quantity of matter in the body

III. The weight of a body is greatest at the equation

IV. The mass of a body is greatest at the poles

A. I and II only

B. I and III only

C. II and IV only

D. III and IV only

 

2. Materials that can be stretched and still returned to their original forms when the stresses are removed are said to be

A. elastic

B. elastomer

C. plastic

D. thermoplastic

 

3.  Which of the following units is derived?

A. kg

B. m

C. K

D.N

 

4. The barometric reading at a place is 73.5cm Hg. Calculate the pressure at a point 30m below the surface the surface of water contained in a reservoir at the place [g =10ms^–2, density of mercury =1.3×10⁴kgm^–3 density of water = 1.0 ×10³kgm^–3]

A. 4.0 ×10⁵Nm^–2

B. 3.0 ×10⁵Nm^–2     

C. 2.0 ×10⁵Nm^–2

D. 1.0×10⁵Nm^–2

 

5. An object floats in a fluid when it displace its

A. volume of fluid in which it floats

B. mass of fluid which it floats

C. weight of fluid it floats

D. density of fluid in which it floats

 

6. The resultant force in a couple is

A. zero

B. infinite

C. the sum of the forces

D. the product of the forces

 

7. The slope of a straight-line velocity-time graph represents

A. Uniform acceleration

B. uniform speed

C. total distance travelled

D. work done

 

8. A body is projected with an initial velocity u at an angle θ to the horizontal. The time taken by it to reach its maximum height is given by the expression.

A. $\frac{2u\sin \theta }{g}$

B. $\frac{{{u}^{2}}{{\sin }^{2}}\theta }{2g}$

C. $\frac{u\sin \theta }{g}$

D. $\frac{u\sin \theta }{2g}$  

 

9. Which of the following statement describes a body in stable equilibrium correctly? A

A. person walking on a tight-rope

B. ball on a smooth horizontal table

C. ball resting on an inverted hemispherical bowl

D. ball in the middle of a hemispherical bowl

 

10. In a school compound, a girl walks 40m due east from the laboratory to the staff room to submit her report. Then she turns and walks  30 m due north to her classroom. Determine the magnitude of her displacement from the laboratory

A. 10m

B. 35m

C. 50m

D. 70m

 

11. Two string each inclined at an angle of 30^o to the horizontal are used to hold a bucket of water weighing 20N. Calculate the tension in each string

A. $20\sqrt{3}N$

B. 20N

C. $10\sqrt{3}N$

D. 10N

 

12. A bullet fired vertically upward reaches a height of 500m. Neglecting air resistance, calculate the magnitude of the initial velocity of the bullet [g = 10ms^–2]

A. 500.0ms^–1

B.  100.0ms^–1

C. 70.0ms^–1

D. 50.0ms^–1

 

 

 

13.    

 

 

 

 

A uniform bar AB is balanced on a knife- edge which is 60cm from B by a mass of 22g which hangs at C, 10cm from A as illustrated in the diagram above. Calculate the mass of the bar.

A. 133.2g

B. 66.0g

C. 60.0g

D. 22.0g

 

14. A body of mass 1000kg is released from a height of 10m above the ground. Determine its kinetic energy just before it strikes from the ground. [g =10ms^–2]

A. 10J

B. 10³J

C 10⁴J

D. 10⁵J

 

15. The diagram below illustrates four test-tube containing the same volume of a liquid at different pressure. In which of the test-tubes does the liquid last if they are supplied with same quantity of heat

 

 

 

 

 

 

16. The crackling noise produced by aluminium roofing sheet during a sunny day is as a result of

A. thermal equilibrium of the sheets

B. conduction of the sheets

C. contraction of the sheets

D. expansion of the sheets

 

17. Water is unsuitable for use as a thermometic liquid because

A. expands unevenly between 0^oC and 4^oC

B. has a narrow temperature range

C. has a concave meniscus

D. maintains a fixed density

 

18.

 

 

 

 

 

 

The diagram above illustrates a block and tackle  pulley system in which an effort E supports a load of 100.0N .If the efficiency of the machine is 75%.Caclulate the value of E

A. 22.2N

B.  38.0N

C. 67.0N
D. 75.0N

 

19. A quantity of hot water at 100^oC is added to 400g of water at 10^oCuntil the temperature of the mixture is 60^oC. Calculate the mass of the hot water added.

[Specific heat capacity of water =4200Jkg^–1K^–1]

A. 200g

B. 320g

C. 400g

D. 500g

 

20

 

 

 

 

 

 

 

 

 

 

 

In an experiment in which a motion substance is allowed to cool, the cooling curve was obtained. The temperature 60^oC is known as the

A. Vaporization point

B. cooling temperature

C. boiling point

D. Melting point

 

21. Which of the following concepts is a method of heat transfer that does not require a material medium?

A. Conduction

B. Radiation

C. Diffusion

D. Convection

 

22. Which of the following units is the S.I unit of heat capacity?

A. J kg^–1

B. J kg^–1K^–1

C  J K^–1

D. J g^–1K^–1    

 

23. The pressure applied to an enclosed fluid at one end is transmitted equally throughout the fluid and to the container walls. This statement is

A. Archimedes’s principle

B. Bernoulli’s principle

C. Pascal’s principle

D. Heisenberg’s uncertainty principle

 

24.

 

 

 

 

 

 

 

 

 

 

 

The diagram above illustrates a wave form. Determine the speed of wave

A ms^–1

B.8.4 ms^–1

C. 9.6 ms^–1

D. 10.0 ms^–1

 

 

25. What type of wave is emitted by a loud speaker?

A. Transverse

B. Longitudinal

C. Gamma

D. Radio

 

26. An object is placed 15cm from a diverging lens of focal length 12cm. The image of the object formed by the lens is

A. real and 6.67cm from the lens

B. virtual and 6.67from the lens

C. real and 60.00cm from the lens

D. virtual and 60.00vm from the lens

 

27.

 

Which of the following types of lenses is suitable for correcting the eye defect illustrated by the ray diagram above?

A. Bi-converging

B. Bi-diverging

C. Plano diverging

D. Diverging meniscus

 

28. A swimming pool is 2.1m deep. If it contains water of refractive index 1.3, Calculate the apparent depth of the pool

A. 3.4m

B. 2.7m

C. 1.6m

D. 0.8m

 

29. When an air column is set into vibrations, the distance between two consecutive nodes of the resultant js

A. one-quarter of the wavelength

B. one-half of the wavelength

C. the wavelength

D. twice the wavelength

 

30. A girl standing some distance from the foot of a tall cliff claps her hands and hears the echo 0.8s later. Calculate her distance from the cliff [speed of sound in air =320ms^–1]

A. 82m

B. 102m

C. 128m

D. 140m

 

31. Red light travels faster than blue light when both of them pass through a glass prism because the

A. refractive index of red light is greater than that of blue light

B. refractive index of blue light is greater than that of red light

C. red light is more intense than the blue light

D. blue light is more intense than the red light

 

32. An object is placed 20cm from a concave mirror of focal length 15cm. Calculate the linear magnification of the image formed

A. 0.5

B. 1.5

C. 2.0

D. 3.0

 

33. All electromagnetic waves in a vacuum have the same

A. wavelength

B. frequency

C. Speed

D. amplitude

 

34.

 

 

 

 

 

 

 

The diagram above illustrates two charges particles W and X. The charges of W and X are respectively

A. negative, negative

B. negative, positive

C. positive, positive

D. positive, negative

 

35. An alternative current supply is connected to an electric lamp which lights with the same brightness as it does with a direct current source of emf 6V. The peak potential difference of the a.c supply is

A. 4.6V

B. 6.0V

C. 8.5V

D. 12.0V

 

36. An electric generator rated 12KW, 2KV distributes power through a cable of resistance of 20Ω. Calculate the power loss in the cable

A. 120W

B. 360W

C. 720W

D. 2400W

 

37. Which of the following is correct? When capacitors of different values are connected in series

A. the same charges flow through them

B. the same voltage appears across each capacitor

C. different quantities of charges flow through them with different voltage across them

D. different quantities of charges flow through them with the same voltage across them

 

38. Which of the following statement(s) about a three-pin plug is/are correct?

I. The brown wire is the live wire

II. The fuse is connected to the live wire

III. The earthwire is coloured blue

A. I only      B. II only

C. I and II only   D. I, II and III

 

39.

 

 

 

 

 

 

 

 

 

 

 

 

The symbol illustrated above is that of a resistor

A. which absorbs light

B. Which emits light

C. which absorbs heats to function properly

D. whose resistance is light dependent

 

40. A wire of cross-sectional area 0.60mm² has a resistivity of 7.2×10^–7Ωm. Calculate the length of wire that will have a resistance of 3Ω

A. 0.25m

B. 2.50m

C. 3.60m

D. 36.00mm

 

41.

 

 

 

 

 

 

 

 

 

A battery of emf 24Vis connected to three resistors P, Q, and R as illustrated in the diagram above. Determine the voltage across the resistor Q

A. 5V

B. 10V

C. 14V

D. 24V

 

42. The mass of the earth is 6.0×10²⁴kg and that of the moon is 7.0×10²²kg. If the distance between them is 4.0×10⁸m. Calculate the force of attraction between them

[G =3.7×10^–11Nm²kg^–2]

A. 1.8 ×10⁵N

B. 1.8 ×10¹⁰N

C. 1.8×10¹⁵N

D. 1.8×10²⁰N

 

43. The angle which the direction of the earth magnetic field makes with the horizontal at a plane is known as

A. angle of contact

B. angle of dip

C. angle of declination

D. magnetic meridian

 

44.

 

 

 

 

 

What must be connected between the points P and Q to establish a steady current through the incomplete circuit diagram illustrated above?

A. Fuse

B. Ammeter

C. Cell

D. Voltmeter

 

45. When current flows through a moving-coil galvanometer, the force exerted on the pointer depends on the

I. strength of the current

II. Magnetic field strength

III. length of the coil

 

Which of the statement(s) above is/are correct?

A. I only

B. II only

C. I and II only

D. I, II and III

 

46. In a nuclear fission process, the mass defect was 1.2×10⁴kg. Calculate the energy released

[Speed of light in vacuum = c = 3.0 ×10^4­­ms^–1 ]

A. 1.08 × 10¹¹J

B. 5.20 × 10¹¹J

C. 1.06 × 10¹²J

D. 2.50× 10¹¹J

 

47. Which of the following statements about a diode is correct?

A. Reverse bias diodes have low resistance

B. Forward bias diodes have high resistance

C. Forward bias diodes produce high current

D. Forward bias function as a result of heat

 

48. Which of the following phenomena best supports the wave nature of matter

A. Electron diffraction

B. Photoelectric effect

C. Electron momentum

D. Black body radiation

 

49. Which of the following radiation constitutes a stream of electrons?

A Gamma rays

B. X-rays

C. Cathode rays

D. Radio Waves

 

50. $_{88}^{226}Ra$ emits two alpha particles to produce Polonium(Po) nuclide. The correct formula for the nuclide is

A. $_{86}^{224}Po$

B. $_{86}^{222}Po$

C. $_{84}^{222}Po$

D. $_{84}^{218}Po$