Paper 1 Physics 2006

8/8/2019 Paper 1 Physics 2006

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Name .Centre and Index No./

Signature

535/1

PHYSICSPaper 1

Oct. / Nov.2006

2 hours

UGANDA NATIONAL EXAMINATIONS BOARD

Uganda Certificate of Education

PHYSICS

Paper 1

2 hours 15 minutes

INSTRUCTIONS TO CANDIDATES:

Write your name, signature, centre and index number clearly in the space above.

Section A contains 40 objective type questions. You are required to write the correct

answer A, B, C or D against each question in the box on the right hand side of each

page.

Section B contains 10 structured questions.

Answers are to be written in the spaces provided on the question paper.

Mathematical tables, side rulers and silent non-programmable calculators may be

used.

Acceleration due to gravity = 10m s-2

Specific heat capacity of water = 4200J kg-1 K-1

For examiners Use Only.

Q.41 Q.42 Q.43 Q.44 Q.45 Q.46 Q.47 Q.48 Q.49 Q.50 MCQ Total

@ 2006 Uganda National Examination Board.

Turn Over.

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SECTION A (40 MARKS)

Answerallquestions in this section.

1. Which of the following shows the correct stages in an internal combustion engine?

A. Compression Power Exhaust Induction.

B. Exhaust Induction compression Power

C. Induction Power compression Exhaust

D. Induction Compression power Exhaust

2. The product of mass and acceleration is

A. force.

B. inertia

C. velocity

D. momentum.

3. A dull black surface is a good

(i) absorber of heat energy.

(ii) emitter of heat energy

(iii) reflector of heat energy.

A. (i) only

B. (ii)and(ii)only

C. (ii) and (iii) only.

D. (i),(ii) and (iii).

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4.

Fig. 1

Calculate the efficiency of the pulley system shown in Figure 1 if the

minimum effort needed to raise a load of 210N is 90N.

A. 90

210 x 3 x 100

B. 90 x 3

210 x 100

C. 210 x 3 x 100

90

D. 210 x 100

90 x 3

5. Turbulent flow of a fluid in a pipe may be caused by

(i) making the pipe narrow

(ii) laying the pipe steeply

(iii) making the fluid to flow slowly and uniformly.

A. (i) only

B. (i) and (ii) only

C. (ii) and (iii) only

D. (i), (ii) and (iii).

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6. When an inflated ballon is released in air with its neck opened, it will

A. rise up.

B. drop to the ground instantly

C. move in the opposite direction to the escaping air.

D. remain in one position.

7. A crane lifts 4 bricks per minute through a height of 1.5 m. find the power that is

expended if each weighs 100 N.

A. 2.5 W

B. 10.0 W

C. 150.0 W

D. 600.0 W.

8. A force of 20 N extends a spring by 10 mm. Find the extension, in mm, caused by a

mass of 0.5 kg.

A. 0.25

B. 1.00

C. 2.50

D. 10.00

9. The ticker-tapes below show the motion of four trolleys moving from left to right.

Which one of them is accelerating?

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10. A piece of metal of mass 120 g is placed in a 100 ml measuring cylinder

containing 20 ml of water. Find the density of the metal if the water level rises to

the 50 ml mark.

A. 1.2 g cm-3

B. 2.4 g cm-3

C. 4.0 g cm-3

D. 6.0 g cm-3

11.

fig.2

Figure 2 shows a block of wood of volume 40 cm3 floating in water with only half of

its volume submerged. F the density of water is 1000 kg m-3, determine the mass of

the wood under water.

A. 40 x 1000 kg.

B. 20 x 1000 kg.

C. 40 x 10-6 x 500 kg.

D. 20 x 10-6 x500 kg.

12. Surface tension in a liquid may be weakened by

A. lowering the temperature.

B. adding soap solution

C. increasing the amount of liquid.

D. increasing the density of the liquid.

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13.

Fig.3

A heater rated 6000 J/min is placed in 2 kg of a liquid. The temperature rise

varies with time as shown in Figure 3. The specific heat capacity of the liquid

in J kg 1 K-1 is

A. 6000 x 2

5 x30

B. 6000 x 5

2 x 30

C. 6000 x 2 x 5

30

D. 6000 x 30

2 x 5

14. A magnet can be made to lose its strength by

(i) heating

(ii) throwing it violently

(iii) putting it in a solenoid carrying direct current.

A. (i) and (iii) only

B. (ii) and (iii) only

C. (i) and (ii) only

D. (i), (ii) and (iii).

15. A given mass of gas occupies a volume of 200 cm3 at a temperature of 270 C and a

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pressure of one atmosphere. Find the volume when its temperature rises to 54 0C

at constant pressure.

A. 200 x 1 x 327

300

B. 300 x 327

200 x 1

C. 200 x 300

327 x 1

D. 327 x 1

200 x 300

16. A material that can be rolled into sheets or drawn into wires without breaking is

said to be

A. strong

B. elastic

C. ductile

D. brittle.

17.Radiation is the transfer of heat

A. in a liquid which involves the movement of the molecules.

B. from one place to another by means of electromagnetic waves.

C. through a material medium without the bulk movement of the medium.

D. through a fluid which involves the bulk movement of the fluid itself.

18.

Fig.4

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A light beam AB is in equilibrium when forces of 2N, 2N and P act on it as shown

in figure 4. Find the magnitude of P.

A. 5 N

B. 4 N

C. 2 N

D. 1 N

19. When potassium dichromate dissolves at the bottom of a water container, it

spreads slowly throughout water by a process called

A. evaporation.

B. diffusion.

C. capillarity

D. convection.

20. The basic difference between transverse and longitudinal waves is in

A. amplitude.

B. wave length

C. direction of vibration

D. medium through which the waves travel.

21. A nickel nuclide, Ni

60

28

contains

A. 28 protons and 28 neutrons.

B. 32 electrons and 28 neutrons.

C. 28 protons and 32 neutrons.

D. 28 electrons and 32 protons.

22. In a ripple tank, constructive interference occurs when

A. the wave is stationary.

B. a crest overlaps with a trough.

C. a crest overlaps with a crest.

D. the wave strikes a barrier.

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23. The activity of a radioactive element with a half life of 30 days is 2400 counts per

second. Find the activity of the element after 12 days.

A. 75 counts per second.

B. 150 counts per second.

C. 300 counts per second.

D. 600 counts per second.

24.

Fig.5

When a current 1, flows through a wire placed in between the poles of a U

magnet as shown in figure 5, the wire move

A. up wards.

B. downwards.

C. towards the south pole.

D. towards the north pole.

25.

Fig. 6

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Five forces of 5N, 3N, 4N, 3N and 3N act on a body as shown in Figure 6. Find the

resultant force on the body.

A. 2N

B. 7N

C. 12N

D. 18N.

26.

Fig .7

Figure 7 shows white light incident on a magenta colour filter. What colour filter

should X be so that red is seen on the screen?

A. Cyan

B. Blue

C. Black

D. Yellow.

27. An object 6 cm high is placed 24 cm from a tiny hole in a pinhole camera. If the

distance from the hole to the screen is 8 cm, find the size of the image on thescreen.

A. 0.2 cm.

B. 2.0 cm

C. 18.0 cm

D. 32.0cm.

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28. Two appliances are rated 240 V, 2 kw and 240 V, 500 W. find the cost of

running these appliances for 3 hours if one unit of electricity costs Shs 70.

A. Shs 105.

B. Shs 175.

C. Shs 420.

D. Shs 525.

29. When does the eclipse of the moon occur?

A. When the moon is between the sun and the earth.

B. When the earth is between the sun and the moon.

C. When the sun is totally eclipsed by the moon.

D. When a bright ring of sunlight shows round the edge of the moon.

30.

Fig.8

Figure 8 represents straight waves A, B, C, D, E and F. If after 5s, A occupies the

position now occupied by F, find the wavelength of the wave.

A. 1 HzB. 3Hz

C. 9 Hz

D. 15Hz.

31. Which one of the following bands has a wavelength greater than that of visible

spectrum?

A. Gamma

B. X-rays

C. Ultra-violet

D. Infrared

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32. A body of mass 2 kg initially moving with a constant velocity of 10 ms 1 is

subjected to a force of 5N for 2s. The change in momentum of the body in kgms-1 is

A. 10

B. 20

C. 30

D. 50

33. When a charged body is brought near a cap of a negatively charged gold leaf

electroscope, the

A. divergence of the leaf does not change.

B. leaf falls if the body is negatively charged.

C. leaf diverges if the body is positively charged.

D. leaf diverges if the body is negatively charged.

34. A straight line through the origin of a velocity-time graph shows that the

A. velocity is uniform.

B. distance is increasing uniformly

C. acceleration is uniform

D. motion is retardation.

35. How long does it take an alternating p.d of peak value 10 V and frequency 50 Hz

to make one cycle?

A. 0.02 s

B. 0.20 s

C. 5.00 s

D. 500.00 s

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36. An electric bulb has a resistance of 960 . Find the electrical power expended

when connected across a 240 V supply.

A. 960

240 x 240B. 240

960

C. 960

240

D. 240 x 240

960.

37. Which one of the following materials can be electrified by friction?

A. Plastic pen.

B. Silver rod

C. Copper rod

D. Wet wood.

38. A p.d of 20 V is applied across two resistors of 4 and 6 connected in series.

Determine the p.d. across the 6 resistor if the total circuit current is 2A.

A. 1.0 V.

B. 2.0 V

C. 3.3 V

D. 12.0V.

39. Which of the following statements is/are true?

(i) When identical cells are in parallel, the total e.m.f is the sum of

individual e.m.fs.

(ii) In a lead-acid accumulator, the lead peroxide acts as the positive

pole.

(iii) The e.m.f of a cell is the total p.d across the external and internal

resistances.

A. (i) only.

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B. (ii) and (ii) only.

C. (ii) and (iii)only.

D. (i) (ii) and (iii).

40. When a steadily increasing force is applied to a moving object, all the following

change except

A. acceleration.

B. momentum.

C. speed.

D. mass.

SECTION B (40 MARKS)

Answerallquestions in this section. All working must be shown clearly in the spaces

provided.

41. (a) State two reasons why mercury is preferred to alcohol as a thermometric

liquid. (02 marks)

..

..

..

..

(b) In a gas thermometer , the pressure of the gas at 00C is 20 cmHg and at 1000 C is

27 cmHg. Determine the room temperature if the pressure at this temperature is

21.4 cmHg. (02 marks)

..

.

42. (a) What is an echo? (01 mark)

..

(b) When a hunter fires a gun, an echo from a cliff is heard 8 s later. How far is the

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hunter from the cliff? ( Speed of sound = 340 ms-1) . (02 marks)

.

(c) State one practical application of echoes. (01 mark)

..

43. (a) Name the particles emitted by radioactive materials. (02 marks)

.

.

(b)

Fig .9

The path of one of the particles in (a) through a magnetic field is as shown in

Figure 9. Identify the particle giving reasons for your answer. (02 marks)

..

..

44. (a) What is meant by uniform velocity? (01 marks)

(b) A car travelling with a uniform velocity of 25 ms 1 for 5s brakes and thencomes to rest under a uniform deceleration in 8 s.

(c) Sketch a velocity time graph of the motion. (01 mark)

.

.

(i) Find the total distance travelled. (02 marks)

..

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45.

Fig .10

Figure 10 shows a negatively charged ball, B ,inside a hollow metal conductor, P,resting on an insulator. Describe the distribution of charge on the metal conductor:

(i) before B touches P. (02 marks)

..

(ii) after B touches P. (02 marks)

..

.

46. (a) Define the term lateral inversion as applied to mirrors. (01 mark)

..

(b) State two properties of an image formed in a concave mirror when the object is

placed between the focal point and the mirror. (01 mark)

..

..

(c) Sketch a ray diagram to show refraction of light makes a pond to appear shallower

than it actually is. (02 marks)

..

..

47. (a) Define the joule. (01 mark)

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..

..

..

(b) The work done to move a body through a distance of 5 m is 30 J. Find the force

that acts on the body. (03 marks)

.

48.

Fig.11

A coil is wound on a soft iron rod as shown in Figure 11.

(a) Describe what is observed when the key , K ,is

(i) closed. (01 mark)

..

(ii) closed and then again opened. (01 mark)

..

(b) State two bold ways by which the effect of what was observed in (a) (i) above can

be increased. (02 mark)

..

..

..

..

49.

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Fig.12

Figure 12 shows the main features of a cathode ray oscilloscope (C.R.O).

(a) (i) Name the parts labelled A, B, and C. (1 marks)

A. ..

B. ..

C. (ii) State the function of the part labelled B. (01 mark)

(b) State three applications of a C.R.O (1 marks)

..

50.

Fig .13

Figure 13 shows a frame work of girders. Identify any two girders which are in

(i) tension (02 marks).

.

(ii) compression (02 marks)

..

..

END

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Paper 1 Physics 2006