THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA

FORM TWO NATIONAL ASSESSMENT

031 PHYSICS 

Time:2:30Hours        Year: 2022

Instructions

1. This paper consists of sections A, B and C with a total of ten (10) questions.
2. Answer all questions
3. Sections A and C carry fifteen (15) marks each and section B carries seventy (70) marks
4. All answers must be written in the space provided
5. All writing must be in blue or black ink except drawings which must be in pencil
6. All communication devices, calculators and any unauthorized materials are not allowed in the assessment room.
7. Write your Examination Number at the top right corner of every page
8. Where necessary the following constants may be used:

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

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) Which one of the following arguments describes the mathematical language used in physics?

1. Matter occupies space
2. Density is mass per volume
3. Volume is the amount of space occupied by the body
4. Physics is a branch of science

(ii) A student has got an electric shock and fell unconscious in the Physics laboratory. Which decision would you take to help the victim immediately?

1. Administer breath exercise
2. Call the physicist
3. Call other students
4. Contact a medical doctor

(iii) An empty glass cup was placed on a digital balance and its mass was 43.63g. Water was then added into the cup and the balance recorded a new mass of 71.06g. What was then added into the cup and the balance recorded a new mass of 71.06g. What was the exact mass of the water added into the cup?

1. 114.69g
2. 27.43g
3. 71.06g
4. 43.63g

(iv) Why are machine engines filled with lubricant oil?

1. To reduces friction between moving particles
2. To increase the viscosity between moving particles
3. To balance the forces acting between moving particles
4. To return the twisted solids to their former state.

(v) A ship sinks lower in fresh water than in sea water. What can you conclude about the density?

1. Fresh water is denser than sea water
2. The density of the sea water is same as of the ship
3. The sea water is denser than fresh water
4. Sea water and fresh water have the same density

(vi) Why does it take a shorter time for a perfume to diffuse in air than in water?

1. Air molecules are fresh compared to water
2. Air molecules are packed closer compared to those of water
3. Water molecules are less far apart compared to those of air
4. Water molecules move with higher speed compared to those of air.

(vii) What is the relationship between pressure and area?

1. On decreasing area, pressure decreases
2. On increasing area, pressure increases
3. On decreasing area, pressure increases
4. On changing area, nothing happens

(viii) What name is given to the process in which a parallel beam of incident light is reflected as a parallel beam in one direction?

1. Diffuse reflection
2. Internal reflection
3. Regular deflection
4. Regular reflection

(ix) Which value of a capacitor would you advice your friend to use in order to replace a set of 3μF.6μF and 9μF capacitors connected in parallel?

1. 50J
2. 250J
3. 150J
4. 100J

(x) Which value of a capacitor would you advice your friend to use in order to replace a set of 3μF.6μF and 9μF capacitors connected in parallel?

1. 1.64μF
2. 16.4μF
3. 18.0μF
4. 1.80μF