CSEE Physics Paper 1 2018 — Past Paper & Online Quiz

3. 10 alamas

For each of the items (i)-(x), fill in the blank spaces by writing the correct answer in your answer booklet.

(i) The ratio of distance moved by effort to the distance moved by load is referred to as __________. 1 alama

(ii) The name given to the heat which is required to raise the temperature of a body by 1 K is __________. 1 alama

(iii) The work done when a force of 1 N moves a distance of 1 m in the direction of force is called __________. 1 alama

(iv) When a p-type and n-type semiconductors are bounded together they form a single crystal called ____________. 1 alama

(v) The nuclear reaction which involves joining of lighter nuclei into heavier nucleus is called ____________. 1 alama

(vi) A device which produces electricity on the basis of electromagnetic induction is called ____________. 1 alama

(vii) A collision during which the kinetic energy changes is known as ____________. 1 alama

((viii) The particles in the nucleus of an atom which carry no charge are called __________. 1 alama

(ix) The wave which makes particles of the medium to vibrate in a direction perpendicular to the direction of movement of the wave is called ____________. 1 alama

(x) The sun looks bigger and hotter than other stars because it is near to the ____________. 1 alama

Boresha ili kuona majibu ya mfano.

5. 0 alamas

(a) List four factors which affect the rate of evaporation of liquids. 0 alama

(b) Define the following terms: (i) Relative humidity. (ii) Calculate the relative humidity given that the reading on dry bulb hydrometer is 24°C and the wet bulb temperature reading is 16°C. 0 alama

(c) With the aid of a sketched graph, explain how temperature affects the saturated vapour pressure of water. 0 alama

Boresha ili kuona majibu ya mfano.

6. 0 alamas

(a) Define the following terms as used in sound waves: (i) Audibility range. (ii) Ultrasonic sound. 0 alama

(b) Why notes of the same pitch played on a violin and flute have different quality? 0 alama

(c) A string of length 75 cm has a mass of 8.2 g. If the tension in the string is 18 N, calculate the frequency of the first and third harmonics. 0 alama

Boresha ili kuona majibu ya mfano.

7. 0 alamas

(a) What is meant by radioactive decay? 0 alama

(b) A certain sample with half-life of 8 days contains 16 g of iodine 131. (i) Write an expression to show the decay process of the sample. (ii) Use an expression in (b) (i) to sketch the graph then estimate the mass of sample which will remain undecayed after 20 days. 0 alama

(c) Describe the use of Geiger-Muller (G-M) tube in detecting nuclear radiations. 0 alama

Boresha ili kuona majibu ya mfano.

8. 0 alamas

(a) Give two examples which illustrate the rectilinear propagation of light. 0 alama

(b) The refractive index of light passing from water to air is 3/4. Calculate the critical angle. Outline two differences between primary and secondary rainbows. 0 alama

(c) In Figure 1, identify the names of colours labeled A, B, C, D, E, F and G. 0 alama Mchoro wa sehemu c

Boresha ili kuona majibu ya mfano.

2. 10 alamas

Match the items in List A with responses in List B by writing the letter of the correct response beside the item number in the answer booklet provided.

List A	List B
(i) Materials that can strongly be magnetized.	A Paramagnetic B Temporary magnets C Zinc and Copper D Permanent magnets E Magnetic domains F Earth’s magnetic field G Induced magnetism H Magnetization I Demagnetization J Permeable K Neutral point L Ferromagnetic M Magnetic field
(ii) Substance which are made up of soft iron.
(iii) Materials that cannot be affected by magnets.
(iv) Objects which are made up of steel.
(v) Groups of magnetic dipoles arranged themselves in a magnetized object.
(vi) Field lines of force used for finding locations of different places.
(vii) The process of aligning the domains of atoms in one direction.
(viii) The process of destroying the alignment in a magnetized material.
(ix) Materials that can redirect field lines of force.
(x) The region around a magnet in which magnetic materials are attracted.

(i) Materials that can strongly be magnetized. 1 alama

(ii) Substance which are made up of soft iron. 1 alama

(iii) Materials that cannot be affected by magnets. 1 alama

(iv) Objects which are made up of steel. 1 alama

(v) Groups of magnetic dipoles arranged themselves in a magnetized object. 1 alama

(vi) Field lines of force used for finding locations of different places. 1 alama

(vii) The process of aligning the domains of atoms in one direction. 1 alama

((viii) The process of destroying the alignment in a magnetized material. 1 alama

(ix) Materials that can redirect field lines of force. 1 alama

(x) The region around a magnet in which magnetic materials are attracted. 1 alama

Boresha ili kuona majibu ya mfano.

4. 6 alamas

Answer all questions in this section. (b) A piece of rubber of volume 100 cm3 and the density of 0.45 g/cm3 floats in water. Calculate:

(a) (ii) has a narrow stem. 2 alama

((b)(i) The force required to immerse the rubber completely. 2 alama

Boresha ili kuona majibu ya mfano.

9. 0 alamas

9. (a) (i) Define the term astronomy. (ii) Enumerate three importance of astronomy to mankind. (b) (i) Specify the difference that exists between galaxy and a planet. (ii) Outline three defining characters of a planet. (c) Briefly explain the importance of stratosphere to living things on the earth’s surface.

(a) (i) Define the term astronomy. (ii) Enumerate three importance of astronomy to mankind. 0 alama

(b) (i) Specify the difference that exists between galaxy and a planet. (ii) Outline three defining characters of a planet. 0 alama

(c) Briefly explain the importance of stratosphere to living things on the earth’s surface. 0 alama

Boresha ili kuona majibu ya mfano.

10. 10 alamas

10. (a) State the following rules: (i) Cork screw rule. (ii) Dynamo rule. (b) (i) Give one structural difference between A.C. and D.C. generators. (ii) Mention one application of induction coil. (c) Figure 2 shows a transformer used to step down power. Assuming that there are no power losses, what will be the ammeter reading on the output part? Figure 2

(a) State the following rules: (i) Cork screw rule. (ii) Dynamo rule. 0 alama

(b) (i) Give one structural difference between A.C. and D.C. generators. (ii) Mention one application of induction coil. 0 alama

(c) Figure 2 shows a transformer used to step down power. Assuming that there are no power losses, what will be the ammeter reading on the output part? 10 alama

Boresha ili kuona majibu ya mfano.

11. 0 alamas

11. (a) (i) What is meant by the term thermal expansion? (ii) Mention two applications of thermal expansion of solids. (b) (i) List three areas where bimetallic strips are used. (ii) Why a bimetal strip made of brass and invar is curved outside with brass? (c) Describe how simple fire alarm system operates.

(a) (i) What is meant by the term thermal expansion? (ii) Mention two applications of thermal expansion of solids. 0 alama

(b) (i) List three areas where bimetallic strips are used. (ii) Why a bimetal strip made of brass and invar is curved outside with brass? 0 alama

(c) Describe how simple fire alarm system operates. 0 alama

Boresha ili kuona majibu ya mfano.

Physics · Karatasi 1 · 2018

Physics · Karatasi 1 · 2018

Sehemu A

Sehemu B

Sehemu C

Fungua