FORM TWO PHYSICS NECTA 2010

THE UNITED REPUBLIC OF TANZANIA MINISTRY OF EDUCATION AND VOCATIONAL TRAINING

FORM TWO SECONDARY EDUCATION EXAMINATION, 2010

0031 PHYSICS 

Time: 2 Hours 

Instructions

1.This paper consists of sections A, B and C.

2.Answer ALL questions

3.Read carefully the instructions given in each section.

4.Write your examination number on every page.

5.Cellphones and calculators are not allowed in the examination room.

SECTION A

1.Answer all questions in this section by writing the letter of the correct answer beside the question number.

(i)Which of the following is a unit of length:

  1.  joule
  2.  metre
  3. .newton
  4. .watt
Choose Answer :


(ii)The reading accuracy of a steel ruler is:

  1.  0.0025mm
  2. .0.01mm
  3. .0.02mm
  4. .0.5mm
Choose Answer :


(iii)Ohm is the SI unit of:

  1.  conductance
  2. .electric current
  3. .potential difference 
  4. upthrust and weight
Choose Answer :


(iv)One of the following is not a pair of forces:

  1.  attraction and repulsion
  2. gravity and diffusion
  3. torsion and gravity
  4. upthrust and weight
Choose Answer :


(v) A car starts from rest and accelerates uniformly at a rate of 6m/s2. What is its velocity 7 seconds later?

  1. .0.42m/s
  2. 4.2m/s
  3. 42m/s
  4. 420m/s
Choose Answer :


(vi)A boy weighing 45kg climbs up a stair case to height of 7 m in 5 seconds. The amount of work done by the boy:

  1. 70 J
  2. 105J 
  3.  450J
  4.  315J
Choose Answer :


(vii)A chemical engineer who wants to know the degree of hotness of the liquid to be used in the chemical process should measure its:

  1.  density
  2. heat
  3. temperature
  4. volume
Choose Answer :


(viii)One of the following is a method of electrification:

  1.  charging by induction
  2. .charging by insulation
  3. .charging by conduction
  4. charging by convection
Choose Answer :


(ix)A victim of electric shock is helped by:

  1.  artificial respiration
  2. being rushed to the hospital
  3. drinking enough water
  4. .having bed rest
Choose Answer :


(x)A current of 0.2A flows through a resistor of 20Ω. The p.d. across the resistor is:

  1.  0.4V
  2. .4V
  3. .40V
  4. 100V
Choose Answer :


(xi) As the balloon goes up, the weight of air displaced becomes less and less. This means that the upthrust: 

  1.  is increased
  2. .is reduced
  3. .is exactly equal to its weight
  4. .remains constant
Choose Answer :


(xii)The action of the gun and the bullet fired supports:

  1. .Law of conservation of momentum
  2.  Newton’s first law of motion
  3. .Newton’s second law of motion
  4. .Newton’s third law of motion
Choose Answer :


(xiii)When a bus is moving with constant velocity, its acceleration is:

  1.  constant
  2. .minimum
  3. maximum
  4. .zero
Choose Answer :


(xiv)The process which helps the rise of kerosene in the wick of a lamp is called:

  1.  capillarity
  2. .expansivity
  3. .surface tension
  4. .viscosity
Choose Answer :


(xv)A body weights 3.0N in air. When it is completely immersed in a liquid it weighs 2.2N, the upthrust experienced by the body is:

  1.  0.4N 
  2.  0.6N 
  3.  0.8N
  4.  1.0N
Choose Answer :


(xvi) A stone is found to have 50 kg by mass at Moshi. When sent to Dar es Salaam its mass will be: 

  1. 50kg
  2. 60kg
  3. 100kg
  4. 150kg
Choose Answer :


(xvii)Pressure in a liquid contained in a vessel depends on the:

  1.  density of the container
  2. .depth of the container
  3. .mass of the liquid
  4. .surface area
Choose Answer :


(xviii)Charging an object by friction results in the transfer of particles called:

  1.  atoms
  2. .electrons
  3. neutrons
  4. protons
Choose Answer :


(xix)Juma wanted to measure the volume of a stone with an irregular shape. Which of the following pairs of instruments would you recommend that he use?

  1. Measuring cylinder and metre rule
  2. Measuring cylinder and overflow can
  3. Metre rule and overflow can
  4. Metre rule and beaker
Choose Answer :


(xx)Penumbra refers to:

  1.  light shadow
  2. moon
  3. .partial shadow
  4. total shadow
Choose Answer :


SECTION B

2.Match the items in List A with responses in List B by writing the letter of the correct response beside the item number.

LIST A LIST B
  1. First class lever
  2. Force of attraction between the earth and a body
  3. Force of attraction between molecules of different substances
  4. Has no unit
  5. Magnetic lines of force
  6. Measures density of liquids
  7. Measured in Newton/second
  8. Second class lever
  1. Adhesion force
  2. A pair of scissors 
  3. Cohesion force
  4. Collision force
  5. Force of gravity
  6. Hydrometer
  7. Impulse
  8. Magnetic effect on a material
  9. Magnetic moment
  10. Neutral point in a magnetic field
  11. Penumbra
  12. Relative Density
  13. Umbra
View Ans


3.Complete each of the following statements by writing the correct answer in the spaces provided:

a)Mass, length and ____are the three fundamental quantities of measurment in Physics.

b)Mention two applications of density in daily life:

c)The formation of a shadow is evidence that light travels in ____

View Ans


4.The mass of an empty density bottle was 50g. When filled with a certain liquid of volume 20cm3 its mass became 75g. Find the:

a)Density of the liquid

b)Relative density of the liquid

View Ans


5.a) Define the term “power”.

b) A man whose mass is 75 kg walked up 12 steps of 20 cm each in 5 seconds. Find the power that was developed.

View Ans


6. a) State the two Laws of Reflection.

b)Draw a diagram showing a plane reflecting surface, reflected ray, incident ray, the normal, angle of incidence and angle of reflection.

c)What is the relationship between angle of incidence and angle of reflection?

View Ans


SECTION C

7.a) A car accelerates uniformly from rest to a speed of 15 km/hr in 10 seconds. Find: (i) The acceleration in m/s2.

(ii) The distance covered during this period in metres.

b)The maximum retardation with which the breaks of a locomotive can reduce its speed is

1.8m/s2. Calculate the time in which the locomotive can be brought to rest.


8.Two cells each with an e.m.f. of 1.5 V and internal resistance of 2Ω are connected in (a) series (b) parallel. Find the current in each case when the cells are connected to 1Ω resistor.

View Ans


9.a) What is atmospheric pressure?

b)If the pressure is 650mm of mercury, express this value in SI units.

View Ans


10.a) Sketch the electrical symbol for each of the following devices:

(i)Ammeter

(ii)Cell

(iii)Switch

(iv)Variable Resistor

b) Sketch different diagrams and indicate the direction of the electric field formed by positive (+) and negative (-) charges in cases of:

(i)Attraction

(ii)Repulsion

View Ans


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