CSEE Physics Paper 1 2005 — Past Paper & Online Quiz

1. 1 alama

An auto mechanic wants to measure the diameter of a wire to the nearest 0.001 cm. Which of the following instruments can be used?

A. Vernier caliper

B. Micrometer screw gauge

C. Metre rule

D. Pair of compasses

E. Engineer's calipers

2. 10 alamas

Match the words/phrases in List A with the responses in List B by writing the letter of the correct response beside the item number. LIST A (i) Velocity ratio (VR) (ii) Length, mass and time (iii) Terminal velocity (iv) Thermal conduction (v) Change of speed of light (vi) A region in which a magnetic force may be detected (vii) Beats (viii) Keepers (ix) Fuse load (x) Has a narrow forbidden

A. Molecules move from a hot point to a cold point.

B. Amplitude.

C. Controls temperature.

D. Basic physical quantities.

E. Magnetic field.

F. Maximum velocity reached by an object released due to viscosity.

G. Semi conductor.

H. Maximum velocity attained by a body when the resultant force is maximum.

I. Distance moved by effort per distance moved by load.

J. Rise and fall of sound of two vibrating objects of nearly equal frequency.

K. Bar magnets.

L. A safety device in electric circuits that breaks the circuit when the current is high.

M. Refraction.

N. No bulky movement of molecules carrying heat.

O. Prevent bar magnets from becoming weaker with age owing to self demagnetization.

P. S.I. System of Units.

Q. Fulcrum between load and effort.

R. Needs sounds of slightly different frequencies.

S. A device in an electric circuit that is connected to the cable that supplies electricity to the appliance on one side.

T. In vacuum the speed remains the same.

7. 8 alamas

(a) (ii) State two (2) types of electric circuits. 1 alama

(b) You have been provided with the resistors of 5 Ω, 10 Ω and 20 Ω. What are the maximum and minimum resistances obtained by connecting those resistors? 4 alama

(c) Study the circuit below and then answer the questions that follow. Figure 2 Calculate the current passing through the circuit when: (i) switch K1 is closed. (ii) switches K1 and K2 are both closed. (iii) switch K1 is open and K2 is closed. 4 alama Mchoro wa sehemu c

Boresha ili kuona majibu ya mfano.

8. 4 alamas

(a) The following represents part of the decay chain for thorium 232 228 228 228 224 Th → Ra → Ac → Th → Ra. 90 88 89 90 88 What particles are emitted at each part of the chain? 2 alama

(b) Identify the type of radiation from the evidence supplied below: (i) absorbed in a few centimetres of air deflected by a magnetic field 1 alama

Boresha ili kuona majibu ya mfano.

10. 7 alamas

((a)(i) Average temperatures of the planets. 1 alama

(ii) Average densities of the planets. (1 mark) 1 alama

(iii) Period of revolutions of planets around the sun. (1 mark) 1 alama

((b)(i) uses small jets of gas in his manoeuvres (movements) instead of swimming like in water. (1 mark) 1 alama

((c)(i) speed of the planet in km per hour. (3 marks) 3 alama

Boresha ili kuona majibu ya mfano.

11. 8 alamas

(a) What are the differences between a conductor, semiconductor and an insulator in terms of their energy levels? (3 marks) 3 alama

((b)(i) Draw their circuit symbols, label them and describe each connection. (2 marks) 2 alama

(c) Sketch a well labelled diagram of a full PNP stabilized common emitter amplifier circuit. Indicate the components responsible for potential dividers and temperature stabilizer. (3 marks) 3 alama

Boresha ili kuona majibu ya mfano.

3. 4 alamas

A solid of mass 85 g was totally immersed in 30.0 cm3 of water in a measuring cylinder. The level of water in the cylinder rose to 55.0 cm3 mark. Find the:

(a) Mass and weight of an object were determined while on the earth and then when on the moon. Suggest reason(s) for variations shown by any one of the two quantities. 3 alama

(i) density of the object 1 alama

(ii) apparent weight of the object while under water. 1 alama

(b(i)) Identify two (2) different opposing forces acting on the object. 2 alama

(b(ii)) Write an equation which shows how the two forces can be used to find the relative density of the object. 1 alama

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4. 8 alamas

A compound strip of brass and iron is straight at room temperature. Draw a labelled diagram to show its appearance when it has been

(a) heated to a high temperature. 2 alama

((b)(i) A compound strip of brass and iron, 10 cm long at 20°C, is held horizontally with iron uppermost. When heated from below with a Bunsen burner the temperature of the brass is 820°C and that of the iron is 770°C. Calculate the difference in lengths of the iron and brass. 4 alama

(c) State four (4) applications of a bimetal strip 2 alama

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5. 6 alamas

Three slabs of different types of glass are placed on a table one on top of the other in the following order from below:

((a)(i) State four (4) characteristics of the image formed by a plane mirror. 2 alama

(b) Why does a swimming pool appear much shallower than its actual depth? 2 alama

(c) Where will a mark on the surface of the table appear to be? 4 alama

Boresha ili kuona majibu ya mfano.

6. 6 alamas

State what you understand by the following expressions:

((a)(i) Magnetic lines of force. 1 alama

((b)(i) the N-pole of one facing the S-pole of the other. 1 alama

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9. 7 alamas

((a)(i) Two (2) devices which apply Pascal's principle. 1 alama

((b)(i) If the plunger is moved through a distance of 0.64 m in exerting its force, through what distance is the piston raised? 2 alama

(c) A 2.0 N weight placed on a 10 cm mark of a metre rule just balances an object hanging from the 60 cm mark. Calculate the weight of the object. 2 alama

Boresha ili kuona majibu ya mfano.

Physics · Karatasi 1 · 2005

Physics · Karatasi 1 · 2005

Sehemu A

Sehemu B

Sehemu C

Fungua