Candidate's Examination Number. . . . . . . . . . . . . . . .

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA 

FORM TWO NATIONAL ASSESSMENT

031 PHYSICS

Time: 2:30 Hours Year: 2024

Instructions

1. This paper consists of sections A, B and C with a total of ten (10) questions.
2. Answer all the questions in each section.
3. All answers must be written in the spaces provided.
4. All writing must be in blue or black ink, except drawings which must be in pencil.
5. Communication devices and any unauthorized materials are not allowed in the assessment room.
6. Write your Assessment Number at the top right corner of every page.
7. Where necessary the following constants may be used:

1. Acceleration due to gravity, g = 10 m/s² 
2. π = 3.14

SECTION A (15 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 in the box provided. (10 marks)

(i) Which sets of equipment represents the application of Physics in schools?

1. Voltmeter, tongs and tripod stand
2. X-rays, ct-scanner and ultra sound 
3. Cooking pans, binoculars and mosquito coils
4. Fax machines, air planes and train

(ii) How would you immediately stop hazards due to the electric faults?

1. Remove the plugs 
2. Switch off the socket key
3. Cut off all connecting wires 
4. Switch off the main switch

(iii) Both density and relative density are physical quantities. How do they differ?

1. Density is a basic quantity while relative density is a derived quantity
2. Density has units but relative density has no units 
3. Density has no units while relative density has units
4. Density is a derived quantity while relative density is a basic quantity

(iv) Why do scientists prefer sending the rocket to Mars from the Moon rather than from the Earth?

1. The gravitational attraction of the moon is large than the earth
2. The moon's shape is smooth compared to the earth
3. The moon is at higher position compared to the earth
4. The gravitational constant of the moon is less than that of the Earth

(v) A body weighs 0.52 N in air. It weighs 0.32 N when it is totally immersed in water and 0.36 when totally immersed in another liquid. What is the density of the other liquid?

1. 1.25 g/cm³ 
2. 0.8 g/cm³
3. 80 kg/m³ 
4. 3250 kg/m³

(vi) Why gases are easily compressed when compared to liquids?

1. Molecules in gas are much further apart than those in liquid.
2. Molecules in gas are free to move than those in liquid. 
3. Molecules in liquid move over a short distance.
4. Molecules in liquid are larger than those in gas.

(vii) Why are the walls of a dam made thicker at the bottom than at the top? 

1. Weight of water at the bottom is 4eSs
2. Pressure of water at the bottom is less
3. Weight of water at the bottom^,is greater
4. Pressure of water at the bottom is greater

(viii) Which one is a natural source of light? 

1. Electrical bulbs 
2. Lightning
3. Candles 
4. Torch

(ix) Which statement is true about a body whose work done is zero? 

1. Its displacement is in the opposite direction to the force applied
2. Its displacement is in the same direction as that of the applied force 
3. Its displacement is in a direction perpendicular to the applied force
4. ts displacement is at an angle to the direction of the applied force

(x) What is the SI unit of the capacitance?

1. Coulomb 
2. Ampere 
3. Farad 
4. Volts