CSEE Physics Paper 1 2003 — Past Paper & Online Quiz

1. 1 mark

For each of the items (i) - (x) choose the correct answer from among the given alternatives and write its letter beside the item number. Each item carries 1 mark.

A. it cannot run fast

B. its equilibrium is stable

C. its centre of gravity is low

D. it is more stable and can run fast

E. its centre of gravity is high.

2. 10 marks

Match the items in list A with the responses in list B by writing the letter of the correct response beside the item number. Each item carries 1 mark. List A (i) Newton metre (Nm) (ii) Reverberation (iii) Longitudinal wave (iv) No evidence of having an atmosphere (v) Neutral point (vi) Motor (vii) ᵯ - radiation (viii) Angle between magnetic north and geographical north direction at the place concerned (ix) Originate from the nuclei of an atom (x) n-type semiconductor List B A Planet Jupiter B Has donor impurity C Angle of variation D A tone heard when a tuning fork is sounded E Gamma rays F Work done G Application of momentum change H Basic physical quantities I A point in magnetic field where resultant field is zero J Planet Mercury K Controls temperature change L Sound waves M Prevents weakening of bar magnets N Converts electrical energy into mechanical energy O The multiple reflection of sound waves when they are placed in an enclosed room or cavity P Deflected by magnetic and electric field Q Paper thickness control R Has acceptor impurity S Rise and fall of sound of two vibrating objects T Angle of variation

(i) Newton metre (Nm) 1 mk

(ii) Reverberation 1 mk

(iii) Longitudinal wave 1 mk

(iv) No evidence of having an atmosphere 1 mk

(v) Neutral point 1 mk

(vi) Motor 1 mk

(vii) ᵯ - radiation 1 mk

((viii) Angle between magnetic north and geographical north direction at the place concerned 1 mk

(ix) Originate from the nuclei of an atom 1 mk

(x) n-type semiconductor 1 mk

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8. 9 marks

(a) cathode rays. 2 mk

(b) State two ways in which X-rays differ from gamma rays. 2 mk

(c) A particular radioactive source has a half-life of 2.0 hours. A sample gives a count of 2400 per second at 11:00 a.m. When will the count have dropped to approximately 300 per second in the same counting system? 4 mk

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3. 5 marks

A 50 g mass is placed on a straight track sloping at an angle of 45° to the horizontal as shown in figure 1 below. Calculate

(i) the acceleration of the load as it slides down the slope 2 mk

(a(i)) Define Acceleration 1 mk

(a(ii)) Define Power 1 mk

(ii) the distance moved from rest in 0.20 seconds. 3 mk

(a(iii) Define Newton 1 mk

(b) State Newton’s second and third laws of motion. 2 mk

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4. 4 marks

A 50 watt heater is inserted in a 2 kg block of aluminium which also holds a thermometer. The temperature of the block rises by 8 K in 5 minutes. Neglecting heat losses, calculate the specific heat capacity of aluminium.

((a)(i) What liquid would be used to measure a temperature of about -80°C? 1 mk

((b)(i) The boiling point of a liquid when the pressure on the liquid is reduced. 1 mk

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5. 4 marks

The distance between the film and the lens in a camera is 6.25 cm when it is focused on an object 1.5 m from the lens. How far must the lens be moved, and in what direction, in order to focus the camera on the distant object?

(i) as a magnifying glass 2 mk

(ii) in a camera 2 mk

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6. 3 marks

Select the best fuse for the following:

(i) A refrigerator rated 250 V, 400 W 1 mk

(ii) The electric cooker rated 240 V, 7.2 kW 2 mk

(iii) The electric iron rated 240 V, 2 kW. 2 mk

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7. 7 marks

Fig 2 below shows two coils X and Y. X is connected to a battery and Y is connected to a centre galvanometer G. [Diagram showing two coils, one connected to a battery and switch, the other to a galvanometer.]

(i) State and explain the deflection of the galvanometer needle when the switch K is closed for a few seconds and then opened. 3 mk

(ii) Why must the galvanometer be a centre zero type? 2 mk

(iii) What would be done in X to increase the current induced in circuit Y? 2 mk

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9. 8 marks

(a) Define impulse and state its SI unit. 2 mk

(b) (ii) the average force of A and B during the collision. 3 mk

(c) Explain about the total kinetic energy of the systems before and after the collision. 3 mk

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10. 8 marks

(a) (iii) Meteoroid and Meteor. 1 mk

(b) (ii) Geocentric theory. 1 mk

(c) Mercury planet is 58 x 10^6 km from the sun and it takes 88 days to complete one orbit around the sun. Calculate the speed of the planet in km/hr to 3 significant figures. 3 mk

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11. 8 marks

(a) (iii) Rectification 1 mk

(b) What are the differences between a conductor, a semiconductor and an insulator in terms of their energy band. 3 mk

(c) Draw the circuit diagram of the full wave rectifier using only two diodes. 4 mk

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Physics · Paper 1 · 2003

Physics · Paper 1 · 2003

Section A

Section C

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