PHYSICS FORM TWO MID TERM ONE EXAM

SECTION A 25MARKS 

1. State a branch of physics that deals with the motion of bodies under the influence of force. (1mrk)



2. Determine the density in kg/m3 of a solid whose mass is 40g and whose dimensions are 30 cm x 4 m x 3 m (3 mrks)


3. Name two types of forces which can act between objects without contact. (2 marks)


4. Give a reason why a concrete beam reinforced with steel does not crack when subjected to changes in temperature. (2 marks)

5. Give two reasons as to why bulbs are connected in series in domestic wiring (2 marks)


6. Two plane mirrors inclined at an angle 60 to each other. A ray of light makes an angle of 40 with mirror M1 and goes on to strike mirror M2. Find the angle of reflection on the second mirror M2. (3 marks)


7. a) Give three types of magnets. (3mrks)


b) State the basic law of magnetism. (1 mks)

c) Given a magnet and a magnetic material, explain how to differentiate between the two. (3 marks)


8. The mixture used to make the pillar was obtained from cement, stones and sand. The ratio of volumes of cement to stone to sand was 1 : 2 : 3. Given that the densities of cement, stone and sand are 1800 kg/m3, 4200 kg/m3 and 3500 kg/m3 respectively. Work out the density of the mixture. (5 marks)

SECTION TWO (55 MARKS ) 

9. State three factors that determine pressure due to a liquid column. (3 mks)



10. Figure shows a simple cell.

i) Name the part labelled A (1 mark)


ii) Name the electrolyte B (1 mark)

iii) It was observed that the bulb lights and after a short time it goes off. Explain why the bulb goes off. (5 marks)


iv) Explain ways to minimize the causes of the bulb going off. (2 marks)


v) Give four maintenance practices of a lead-acid accumulator. (4 marks)



11. (a) State the basic law of electrostatics. (2 mark)


(b) The following diagram illustrates a method of charging a metal sphere.

i) What name is given to the method of charging shown above? (1 marks)

ii) Complete the diagrams to show the final charge on the sphere. (4 marks)

iii) Explain the term earthing as used in electrostatics. (2 marks)

12. The mass of an empty density bottle is 20g. The bottle weighs 50g when full of water. When metal granules are put in the bottle it weighs 80g. If water is added to the metal granules, the mass of the bottle and its contents is 100g. Given that the density of water is 1g/cm3, determine,

i) The volume of water that fill the density bottle. (3 marks)

ii) The mass of the metal granules. (1 mark)


iii) The volume of the metal granules. (3 marks)


iv) The density of the metal granules (3 marks)

13. In the diagram below, the ice remains unmelted for some time as heating continues.

(i) What is the purpose of wire gauze? (1mk)

(ii) By what modes of heat transfer does the water receive heat? (2mks)

(iii) Why does the ice remain unmelted for some time? (2mks)

(iv) What can be deduced in this experiment about the property of water? (2mk)


14. i) Differentiate between a primary cell and a secondary cell. (2 marks)


ii) Give three uses of a gold leaf electroscope. (3 marks)

iii) Determine the number of images formed by two plane mirrors at an angle of 300 (3 marks)


iv) Give two characteristics of the image formed by a pinhole camera (2 marks)

v) Give three qualities of a good thermometric liquid. (3 marks)

vi) Identify all the electrical devices in the circuit below. (7 marks)