PRESIDENT’S OFFICE
REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT
MINISTRY OF EDUCATION, SCIENCE AND TECHNOLOGY-BARIADI DISTRICT COUNCIL
FORM TWO PRE –MOCK EXAMINATION MARCH 2023
SUBJECT CODE: 031 PHYSICS
TIME : 2: 30 HRS
INSTRUCTIONS.
1. This paper consists of section A, B and C with a total of ten (10) questions.
2. Answer all questions
3. Section A and C carry fifteen (15) marks each and section B carries seventy (70) marks.
4. ALL writing must be in blue or black ink except drawings which must in pencil.
5. ALL communication devices, calculators, and any unauthorized materials are not allowed in the examination room.
6. Where necessary use the following constants
(i)Gravitational force, g=10N/kg
(ii)Density of water 100 kg/m³ or 1g/cm³
SECTION A (15 Marks)
Answer all question
1. For each of the items (i) – (x), choose the correct answer from the given alternatives and write its letter in the box provided.
(i)One of the following is a step in the scientific method.
A. Debating B. Experimentation C. Advertising D. Composition
(ii)Which one of the following shows a combination of base quantities for force?
A. mass x length/Time B. mass x time/Length
C. Mass x length/Timextime D. Mass x length/Length x length
(iii) The capacitance of a capacitor when a charge of one coulomb changes its potential difference by one volt is _______
A. One coulomb B. 0.5C C. One charge D. 1 farad(1F)
(iv)A laboratory technician tells the form two students that in order to detect the presence of current use the following device.
A. Ammeter B. capacitor C. Galvanometer D. Voltmeter
(v)An object has a mass of 50kg. What is its potential energy when it's placed at a height of 20cm above the ground?
A. 100J B. 1000J C. 10000J D. 500J
(vi)Hydrometer helps us to check the purity of liquids as each liquid has ______
A. a fixed mass B. a fixed density C. a fixed length D. a same density
(vii) One of the following is not a form of energy If is _______
A. Thermal energy B. Sound C. Kinetic theory D. Solar energy
(viii) Solar system is held together by ________
A. Friction force B. viscous force C. Strong nuclear force D. Gravitational force
(ix)We use cotton towels to dry ourselves after bathing due to _____
A. Plasticity B.Capillarity C. Surface tension D. Elasticity
(x)A number of images formed when two plane mirrors are inclined to each other at an angle of 45° is ________
A. 7 image B. 8 image C. 9 image D. 45 image
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2. Match each Item in LIST A with correct response in the LIST B by writing the letter of the correct response below the item in the table provided.
LIST A |
LIST B |
(i)Dry all (ii)Fuse (iii)Switch (iv)Capacitor (v)A volt |
A. The energy given to each coulomb of charge B. Converts electrical energy to heat and light energy C. 1.5V D. Opens and closes a circuit E. Measures current F. Stores charges G. Breaks the circuit if excessive current flows H. Detects the presence of current. |
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SECTION B (70 Marks)
Answer all questions.
3. (a) Describe factors that affect the resistance of a conductor (08 marks)
(b) Differentiate ohmic conductors and non-ohmic conductors (02 marks)
4. (a) Explain why when washing clothes, we use detergent. (05 marks)
(b) (i) Distinguish between osmosis and diffusion. (02 marks
(ii) If a mass of 100g causes an extension of 2.5cm. find the mass which will give extension of 8.7cm. (03 marks).
5.(a) (i) Why does a walking elephant have high kinetic energy? (o2 marks)
(ii)If Joshua lifts a load weighing 500N through a height of 20m in 200 seconds, what is the power of Joshua. (04 Marks)
(b) State four uses of a plane mirror in daily life.
6.(a) (i) Mention three appliance that use capacitors (o1 ½ marks)
(ii)If a P.d 6V is measured across the ends of a wire of resistance 12V. Calculate the current flows through if? (03 ½ marks)
(b) (i) Define the term relative density of a solid (02 mark)
(ii)The mass of a density bottle is 14g. when its is filled full with a fluid of density 1.2g/cm3.Its mass is 38g. find the volume of the bottle. (03 marks)
7. (a) One student was with his friend when they were leaving school to go home. One of them picked up a magnet on the way, but his friend told him to throw it away and not take it. If you were the one who picked up the magnet, what would you say to your friend who tells you to throw it away?. (05 marks)
(b) Explain why most of them are mechanical.
(i) Engineers loosening a nut using a wheel spanner? (1 ½ marks)
(ii)What are necessary conditions for a body to be in equilibrium? (01 ½ marks)
8.(a) Define the following terms as used in physics
(i)Simple machine
(ii)Mechanical advantages.
(b) In physics laboratory students of a certain secondary school were doing an experiment of current and obtained the data of current and voltage, and they draw conclusion by drawing the graph of voltage against current, what is the physical meaning of the slope of the graph? And how it can be connected in the electric circuit. (05 marks)
9.(a)What would happen if the feets of an elephant were as sharp as a nail? (05 marks)
(b) Water of density of 1000kg/m³ has a column 20m high Another liquid has density 3.6g/cm³. Find its height if exerts the same pressure as the pressure of water at the bottom of the column. (05 marks)
SECTION C (15 Marks)
Answer question ten (10)
10. (a) Draw a well labeled sketch of a gold leaf electroscope.
(b) Explain three (3) factors affecting capacitance of a parallel plate capacitor.
(c) What are the uses of the gold leaf electroscope (four points).
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