THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA CERTIFICATE OF SECONDARY EDUCATION EXAMINATION

031/1 PHYSICS 1

(For Both School and Private Candidates)

Time: 3 Hours Year: 2024

Instructions

1. This paper consists of sections A, B and C with a total of eleven (11) questions.

2. Answer all questions in sections A and B and two (2) questions from section C.

3. Communication devices and any unauthorised materials are not allowed in the examination room.

4. Non-programmable calculators and mathematical tables may be used.

5. Write your Examination Number on every page of your answer booklet(s).

6. Where necessary the following constants may be used:

1. Acceleration due to gravity, g = 10 m/s².
2. Specific heat capacity of copper = 390 J Kg °C^-1.
3. Specific heat capacity of water = 4200 J Kg °C^-1.
4. Specific heat capacity of a piece of metal = 400 J Kg °C^-1.
5. Density of mercury = 13,600 kg/m³.
6. Density of air = 1.25 kg/m3.
7. Pie, π= 3.14.
8. The speed of sound in air = 330 m/s.

SECTION A (16 Marks)

Answer all questions in this section.

1. For each of the items (i) - (x), choose the correct answer from the given alternatives and write its letter beside the item number in the answer booklet provided. (10 marks)

(i) What does the following warning sign mean in relation to the contents in the container?

1. Radioactive
2. Explosive
3. Flammable
4. Oxidizing agent
5. Toxic

(ii) The following are the uses of relative density in everyday life, except

1. Designation of various structures such as ship and planes
2. Selections of building materials
3. Identification of germs
4. Determination of density of unknown substances
5. Designation of swimming and diving equipment

(iii) Which one represent the fundamental forces?

1. Compressional, torsional and frictional forces
2. Gravitational, torsional and frictional forces 
3. Nuclear, gravitational and electromagnetic forces
4. Stretching, attraction and repulsion forces
5. Viscosity, frictional and restoring forces

(iv) If a bubble of air is released at the bottom of a water pond, it will rise to the water surface of the pond. Why does this happen?

1. The weight of the bubble is greater than the upthrust
2. The density of water is the same as that of the air bubble
3. Upthrust is equal to the weight of the air bubble
4. Upthrust is greater than the weight of the air bubble
5. Upthrust is less than the weight of the air bubble

(v) How much heat energy is given out by a copper block of 40 g mass when it cools from 1840 ^°C to 40 ^°C?

1. 8008 J 
2. 2800 J 
3. 2808 J 
4. 28000 J 
5. 28080 J

(vi) In an experiment to observe the flow of different liquids in the same container, it takes 3 minutes and 10 minutes to pour cooking oil and honey into a 5 litre gallon, respectively. How is honey distinguished from cooking oil?

1. Honey has a higher viscosity than cooking oil
2. Honey offers low resistance than cooking oil
3. Cooking oil has higher viscous force than honey
4. Honey is heavier than cooking oil
5. Cooking oil offers high resistance than honey

(vii) The following diagram shows a movement of a model car starting from point A after being released from a compressed spring and stops at point C above the horizontal surface. Which one will be the set of energy changes in this process?

1. Gravitational potential energy, kinetic energy then spring potential energy
2. Kinetic energy, chemical energy then gravitational potential energy
3. Chemical energy, kinetic energy then gravitational potential energy
4. Spring potential energy, kinetic energy then gravitational energy
5. Mechanical energy, kinetic energy then gravitational potential energy

(viii) The Figures 1, 2 and 3 show a wire carrying electric current around the magnet. In which figure(s) the connection(s) will cause a magnet retain its magnetic field strength?

Figure 1

Figure 2

Figure 3

1. Figure 1
2. Figure 2
3. Figure 3
4. Figure 1 and 2
5. Figure 2 and 3

(ix) The graphs 1, 2 and 3 represent the motion of a body travelling from point M to N. Which graph(s) represents the motion of a uniform velocity in a straight line?

1

2

3

1. 1, 2 and 3
2. 1 alone
3. 2 and 3
4. 1 and 3
5. 1 and 2

(x) Why windmills are constructed around the coastal areas, in open plains, in gaps of mountain ranges or at the top of rounded hills?

1. Because these are cheap areas to harvest wind energy.
2. Because there are no obstructions and strong winds blow to rotate wind turbines propellers.
3. Because when the sun heats the atmosphere some patches become warmer than the others.
4. Because there are less movement of people and vehicles in those areas.
5. Because the wind turbines are noisy and can spoil the landscape.