NATIONAL SENIOR CERTIFICATE EXAMINATION NOVEMBER 2013

NATIONAL SENIOR CERTIFICATE EXAMINATION NOVEMBER 2013

Time: 3 hours

PHYSICAL SCIENCES: PAPER I

200 marks

PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY

1. This paper consists of: ? a question paper of 13 pages; ? a yellow Answer Booklet of 5 pages (i ? v); and ? a green Data and Formulae Booklet of 4 pages (i ? iv).

Please make sure that your question paper is complete.

2. Remove the Data Booklet and Answer Sheet from the middle of this question paper. Write your examination number on the yellow Answer Booklet.

3. ALL of the questions must be answered.

4. Read the questions carefully.

5. Use the data and formulae whenever necessary.

6. QUESTION 1 consists of 10 multiple-choice questions. There is only one correct answer to each question. The questions are answered on the inside front cover of your Answer Book. The letter that corresponds with your choice of the correct answer must be marked with a cross as shown in the example below:

A B C D Here the answer C has been marked.

7. Questions 3.2 and 4.1.3 must be answered in the yellow Answer Booklet.

8. Start each question on a new page.

9. It is in your own interest to write legibly and to set your work out neatly.

10. An approved calculator (non-programmable, non-graphical) may be used.

11. Show your working in all calculations.

12. Units need not be included in the working of calculations, but appropriate units should be shown in the answer.

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QUESTION 1

MULTIPLE CHOICE

Answer these questions on the inside front cover of your Answer Book. Make a cross (X) on the letter of the response which you consider to be the most correct.

1.1 What name is given to the ability of a wave to spread after it passes through a small gap?

A refraction B diffraction C interference D reflection

1.2 Which one of the following correctly describes the speed of the source and the type of interference, when a shock wave is formed by a moving sound source?

Speed of sound source Type of interference

A Subsonic

Constructive

B Subsonic

Destructive

C Supersonic

Constructive

D Supersonic

Destructive

1.3 Which one of the following correctly places the given electromagnetic waves in order of increasing wavelength?

A infra-red, microwaves, ultra-violet B microwaves, gamma rays, visible light C radio waves, microwaves, visible light D ultra-violet, visible light, microwaves

1.4 What type of electrical machine is represented in the diagram below?

A d.c. motor B a.c. motor C d.c. generator D a.c. generator

[Adapted from PLATO MSS 11 ? 16]

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1.5 In the circuit shown below the resistances of the battery, ammeter, switch and connecting wires are negligible. The voltmeter has a very high resistance.

How are the readings on the ammeter and voltmeter affected if switch S is opened?

AMMETER

A

Decrease

B

Decrease

C

Increase

D

Increase

VOLTMETER Increase No change No change Decrease

1.6 Which one of the following arrangements of diodes will change the a.c. input current to d.c. in such a way that the top plate (X) of the capacitor is always negative?

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1.7 The diagram represents a cross-section through a rectangular current carrying coil of lengths R and S, of a motor, between magnetic poles, P and Q. The magnetic field lines are shown.

Which one of the following correctly gives the polarity of the pole P and the direction of the current inside R of the coil?

Polarity of P A South B South C North D North

Current in R Into page Out of page Into page Out of page

1.8 Which one of the following position vs time graphs represents a ball that is dropped and bounces TWICE before coming to rest? The frame of reference is the starting point.

A

B

C

D

1.9 Two identical bodies are dropped from rest from different heights in a vacuum. After they have both fallen for the same time which one of the following physical quantities will be different for the two bodies?

A velocity B kinetic energy C gravitational potential energy D acceleration

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1.10 A box is pulled in a straight line, a distance x, across a horizontal rough surface by means of a rope inclined at an angle to the horizontal. The constant applied force is F and the constant frictional force is f.

The work done by the rope on the box in moving it a distance x is:

A F.x B (Fcos ? f).x C (Fcos + f).x D Fcos.x

[20]

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