THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA FORM TWO NATIONAL ASSESSMENT
031 PHYSICS
Time: 2:30 Hours Friday, 15thNovember 2019 a.m.
Instructions
1. This paper consists of sections A, B and C with a total of ten (10) questions.
2. Answer all questions.
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. All communication devices, calculators and any unauthorized materials are not allowed in the examination room.
6. Write your Examination Number at the top right hand corner of every page.
7. Where necessary the following constants may be used:
(i) Acceleration due to gravity, 3 g = 10m / s2. 3 (ii) Density of water = 1g / cm or 1000kg / m .
SECTION A (30 MARKS)
1. For each of the items (i) - (xx), choose the correct answer from the given alternatives and write its letter in the box provided.
(i) Why Physics, Chemistry and Biology are natural science subjects?
(ii) Which of the following is a safety precaution in the Physics laboratory?
(iii) Which instrument will you use to measure accurately the inside diameter of a bottle neck?
(iv) Which of the following statements is correct about mass?
(v) A hydrometer is an instrument used to measure
(vi) When a body of mass M, is lifted through a height h, it possesses the energy known as
(vii) If the angle between two plane mirrors is 60°, what will be the number of images?
(viii) The presence of charge in a material can be demonstrated by
(ix) A current of 0.2 A flows through a resistor of 4Ω. The potential difference across a resistor is
(x) The process of removing magnetism from a material is known as
(xi) How can a real image be distinguished from a virtual image?
(xii) Why an atom is electrically neutral?
(xiii) A potential difference of 12V is applied across a resistor of resistance 24 Ω. The current in a circuit is
(xiv) If a North pole is used in the stroking method of magnetization, the end where the stroking begins is
(xv) The Figure 1 shows a ruler balanced by placing the loads at its ends. What is the weight of X?
(xvi) Which of the following is an example of a third class lever?
(xvii) Distance between two moving objects will change if
(xviii) While of the following best illustrates Newton’s third law?
(xix) The temperature of a body of −40°C in Kelvin (K) scale is
(xx) Which of these resources of energy is non-renewable?
2. Match the items in List A with a correct response in ListB by writing a letter of a correct response below the corresponding item number in the table provided.
List A | List B |
|
|
3. Complete each of the following statements by writing the correct answer in the space provided.
(i) Basic physical proportions of measurement which cannot be obtained from any other proportions by either multiplication or division are called.
View Ans(ii) Staircases, winding roads uphill, wedges and a screw are physical examples of
View Ans(iii) The resistance of a body to change its state of rest is called
View Ans(iv) Objects which emit light when they are hot are called
View Ans(v) Materials which obey Hooke’s law are known as
View AnsSECTION B (50 MARKS)
4. (a) What do you understand by the following terms?
(i) Work
View Ans(ii) Energy
View Ans(iii) Power
View Ans(b) Calculate the power of a pump which can lift 200 kg of water through a vertical height of 6 m in 10 seconds.
View Ans(c) A 1000 kg car is travelling down the road at a speed of 15 m/s. How much kinetic energy does it have?
View Ans5. (a) (i) Briefly explain the motion of an object under gravity by taking an example of a ball thrown straight up into the air
View Ans(ii) A car with a velocity of 60 km/h is uniformly retarded and brought to rest after 10 seconds. Calculate its acceleration.
View Ans(b) (i) Distinguish between distance and Displacement.
View Ans(ii) Provide one example of the law of inertia of a body
View Ans(c) What mass will be given to a body with an acceleration of 7 m/s2 by a Force of 3N?
View Ans6. (a) State Pascal’s principle of pressure
View Ans(b) What are the three factors that affect the liquid pressure?
View Ans(c) Calculate the area of an object if the pressure exerted is 0.2 N/m2 and its force is 2 N.
View Ans7. (a) Light is a form of energy. State any two characteristics of it which can be distinguished from other forms of energy.
View Ans(b) With the aid of a diagram, state the laws of reflection.
View Ans(c) How many images can be formed if two mirrors are set?
(i) At an angle of 60°
(ii) Parallel to each other.
View Ans8. (a) State the principle of moments.
View Ans(b) Distinguish between stable equilibrium and unstable equilibrium.
View Ans.(c) A metre rule is pivoted about a point O as shown in Figure 2 and it is balanced by a load of 0.2 N.
Calculate the mass of the rule.
View AnsSECTION C (20 MARKS)
9. (a) What are the uses of the following devices?
(i) Manometer
(ii) Hare’s apparatus (inverted U-tube)
(iii) U-tube
(iv) Barometer
View Ans(b) Why a big Elephant manages to walk comfortably in muddy soil without sinking while a human being may sink easily?
View Ans(c) Draw a well labeled diagram which demonstrates that liquid pressure depends on depth.
View Ans10. (a) Mention three uses of current electricity
View Ans(b) Why is it advised to connect bulbs in parallel arrangement during installation of electricity in most buildings?
View Ans(c) Form one students at Saku Secondary School who were conducting an experiment to verify Ohm's Law in the laboratory, were given the following instructions: Connect in series a resistor R, a battery B of two cells, a switch K, an ammeter A and rheostat S. Then connect a voltmeter V across resistor R. Draw a well labelled circuit representing this experiment.
View Ans