FORM TWO PHYSICS NECTA 2009

A physicist is generally interested in studying the relationship between:

  1.   composition and decomposition of matter
  2. matter and energy
  3. Physics and Chemistry 
  4.  Physics and energy



The measurement of mass using beam balance uses the principle of:

  1.    conservation of matter
  2.  conservation of momentum
  3. gravitational pull of the earth
  4. moments



(iii)         A soldier firing a bullet from a gun experiences a jerking effect as the bullet leaves the gun. This phenomenon is explained by: 

  1. Newtons first law of motion. 
  2. Newtons second law of motion.
  3.  Newtons third law of motion.
  4.  Principle of conservation of linear momentum.
Choose Answer :


(iv)          Materials which allow light to pass and you can see through are called:

  1.  glass
  2. opaque
  3. translucent
  4.  transparent
Choose Answer :


(v)  In order to balance a rigid body on a point, you must first determine

its:

  1. balancing point
  2. centre of gravity
  3. central position of the body
  4. neutral point
Choose Answer :


vi) If one cell in a perfect three-cell torch is placed in the opposite direction, then on switching on the torch will:

  1.  give normal light. 
  2.  give bright light. 
  3. give dim light. 
  4. not give light.
Choose Answer :


(vii)        The following instruments are used to measure length except:

  1. hydrometer
  2.   metre rule
  3. micrometer screw gauge 
  4.  vernier callipers
Choose Answer :


(viii)      Presence of friction in a machine:

  1.  causes proper functioning of the machine
  2.  increases efficiency of the machine
  3. increases life time of the machine 
  4.  reduces efficiency of the machine
Choose Answer :


(ix)          You feel more pain if someone with pointed high heels shoes steps on your foot than when the same person with flat shoes steps on you because:

  1. the flat shoes are not as heavy as the pointed ones
  2. the leather of the shoes has big weight
  3.  pressure exerted is greater with flat shoes
  4.   pressure exerted is greater with pointed high heel shoes
Choose Answer :


(x)           Gradient of the distance-time graph of a uniformly accelerated motion in a specific direction represents:

  1.  acceleration 
  2.  deceleration 
  3.  speed 
  4. velocity
Choose Answer :


(xi)          Evaporation of a liquid does not depend on:

  1.  amount of liquid available   
  2.  surface area 
  3.  temperature   
  4. wind
Choose Answer :


(xii)        According to Archimedes Principle, upthrust is equal to the:

  1.   apparent weight.
  2. volume of fluid displaced.
  3. weight of fluid displaced.
  4. weight of the displaced object.
Choose Answer :


(xiii)      Suppose you wanted to make strong permanent magnets, which of the following materials would you select?

  1.  Cobalt and Iron   
  2.  Copper and Cobalt 
  3. Copper and Nickel  
  4.  Nickel and Cobalt
Choose Answer :


(xiv)      White clothes are preferentially worn in sunny regions than black clothes because they:

  1.  absorb heat. 
  2. diffuse heat.
  3.  reflect heat. 
  4. transmit heat.
Choose Answer :


(w) Smell from a rotten dog along the road spreads to the neighbouring houses through a process known as:

  1.  capillarity 
  2.  diffusion 
  3. osmosis 
  4. viscosity
Choose Answer :


(xvi) Work and energy have the same SI unit called:

  1.  calorie 
  2.  joule 
  3.  paschal 
  4.  watt
Choose Answer :


(Wii) If you comb your dried hair with a plastic or nylon comb, you might observe the comb attracting some small particles. What instrument would you use to determine whether the comb acquired some electric charge?

  1.  Ammeter 
  2.  Electrophorus 
  3.  Gold-leaf electroscope 
  4.  Voltmeter
Choose Answer :


(xviii)  The effort that would be needed to operate a 1200N load when the machine has a mechanical advantage of 3 is:

  1.  400N       
  2.  600N  
  3.  BOON 
  4.  3600N
Choose Answer :


(xix)      The temperature of hot water was measured using a Fahrenheit thermometer and was found to be 1760F. What was its equivalent on the Celsius scale?

  1.  800C  
  2. 1160
  3.  2590C
  4.  3480 C
Choose Answer :


(xx)        Bimetallic strip bends when heated because metals:

  1.  become softer when heated
  2. expand in opposite direction
  3. have different expansivities
  4. have same expansivities
Choose Answer :


THE UNITED REPUBLIC OF TANZANIA MINISTRY OF EDUCATION AND VOCATIONAL TRAINING

FORM TWO SECONDARY EDUCATION EXAMINATION, 2009

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.

6.Whenever necessary use the following constants:

Acceleration due to gravity = 10m/s2

SECTION A

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

(i)A physicist is generally interested in studying the relationship between:

  1. composition and decomposition of matter
  2. matter and energy
  3. Physics and Chemistry
  4. Physics and energy
Choose Answer :


(ii)The measurement of mass using a beam balance uses the principle of:

  1. conservation of matter
  2. conservation of momentum
  3. gravitational pull of the Earth
  4. moments
Choose Answer :


(iii) A soldier firing a bullet from a gun experiences a jerking effect as the bullet leaves the gun. This phenomenon is explained by: 

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


(iv)Materials which allow light to pass and you can see through are called:

  1. glass
  2. opaque
  3. translucent
  4. transparent
Choose Answer :


(v)In order to balance a rigid body on a point, you must first determine its:

  1. balancing point
  2. central position of the body
  3. centre of gravity
  4. neutral point
Choose Answer :


(vi)If one cell in a perfect three-cell torch is placed in the opposite direction, then switching on the torch will:

  1. give normal light
  2. give bright light
  3. give dim light
  4. not give light
Choose Answer :


(vii)The following instruments are used to measure length EXCEPT:

  1. hydrometer
  2. metre rule
  3. micrometer screw guage
  4. vernier callipers
Choose Answer :


(viii)Presence of friction in a machine:

  1. causes proper functioning of the machine
  2. increases efficiency of the machine
  3. increases life time of the machine
  4. reduces efficiency of the machine
Choose Answer :


(ix)You feel more pain if someone with pointed high heel shoes steps on your foot than when the same person with flat shoes steps on you because:

  1. the flat shoes are not as heavy as the pointed ones
  2. the leather of the shoes has big weight
  3. pressure exerted is greater with flat shoes
  4. pressure exerted is greater with pointed high heel shoes
Choose Answer :


(x)Gradient of the distance-time graph of a uniformly accelerated motion in a specific direction represents:

  1. acceleration
  2. deceleration
  3. speed
  4. velocity
Choose Answer :


(xi)Evaporation of a liquid does not depend on:

  1. the amount of liquid available
  2. surface area
  3. temperature
  4. wind
Choose Answer :


(xii)According to Archimedes’ Principle, upthrust is equal to the:

  1. apparent weight
  2. volume of fluid displaced
  3. weight of fluid displaced
  4. weight of the displaced object
Choose Answer :


(xiii) Suppose you wanted to make strong permanent magnets, which of the following materials would you select: 

  1. Cobalt and Iron
  2. Copper and Cobalt
  3. Copper and Nickel
  4. Nickel and Cobalt
Choose Answer :


(xiv)White clothes are preferentially worn in sunny regions to black clothes because they:

  1. absorb heat
  2. diffuse heat
  3. reflect heat
  4. transmit heat
Choose Answer :


(xv)Smell from a rotten dog along the road spreads to the neighbouring houses through a process known as:

  1. capillarity
  2. diffusion
  3. osmosis
  4. viscosity
Choose Answer :


(xvi)Work and energy have the same SI unit called:

  1. calorie
  2. joule
  3. pascal
  4. watt
Choose Answer :


(xvii)If you comb your dried hair with a plastic or nylon comb, you might observe the comb attracting some small particles. What instrument would you use to determine whether the comb acquired some electric charge:

  1. ammeter
  2. electrophorus
  3. gold-leaf electroscope
  4. voltmeter
Choose Answer :


(xviii)The effort that would be needed to operate a 1200N load with a mchine that has a mechanical advantage of 3 is:

  1. 400N
  2. 600N
  3. 800N
  4. 3600N
Choose Answer :


(xix)The temperature of hot water was measured using a Fahrenheit thermometer and was found to be 176°F. What was its equivalent on the Celsius scale?

  1. 80°C
  2. 116°C
  3. 259°C
  4. 348°C
Choose Answer :


(xx) Bimettalic strips bend when heated beacause metals:

  1. become softer when heated
  2. expand in opposite direction
  3. have different expansivities
  4. have same expansivities
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. Apparent loss in weight
  2. Attractive force between molecules of the same substance
  3. Load over effort
  4. Oil and grease
  5. Tangential force on liquid surface
  6. Temperature at which solid changes to liquid
  7. The moon is between the Earth and the sun
  8. Solid changing to vapour directly
  1. Cohesive force
  2. Lubricants
  3. Mechanical Advantage
  4. Melting point
  5. Solar eclipse
  6. Sublimation
  7. Surface tension Upthrust
  8. Moon eclipse
  9. Velocity Ratio
  10. Evaporation
  11. Adhesive force

NUMBER OF LIST A

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

(viii)

LETTER OF LIST B









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Answer questions 3 – 6 by filling in the correct answers in the spaces provided.

3.Differentiate between boiling and evaporation:

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4.For an object to remain in equilibrium when subjected to a number of parallel forces, the following conditions must be met:

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5.a) Three methods commonly used to magnetize magnetic materials are:

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b) One similarity between micrometer screw gauges and vernier callipers is that:

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6.a) Heat is ____________________________________________

while temperature is ____________________________________________.

b)The efficiency of a machine is always less than 100% because

c)The pressure exerted on an area of 10 m2 by a force of 2N is:

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SECTION C

7.a) Give the difference between acceleration and deceleration.

b)A car accelerates uniformly from 480 m/s in 50 seconds. It then decelerates to a stop in 100 seconds. Calculate the acceleration and deceleration of the car.

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8.a) A block of iron of mass 1kg is placed on top of a horizontal table. If the horizontal force required to just move the block is 1.96N, calculate the coefficient of friction between the two surfaces.

b)The temperature of 2kg of a metal block was raised from 40°C to 90°C. The heat energy used was 38,000J. Calculate the specific heat capacity of the metal.

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9.a) Draw an electric circuit showing proper arrangement of ammeter (A), voltmeter (V), battery of two cells, a fixed resistor (R), and an open switch (S). Show the direction of flow of current (I).

b)Calculate the amount of voltage required to drive a current of 2A through a resistor of 20Ω.

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10.a) Mention types of mechanical energy

b)A body of mass 10kg is raised to a height of 4 metres above the ground in 2 seconds.

(i)Find the energy possessed by the body after raising it.

(ii)What type of energy is possessed by the body?

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