FORM TWO PHYSICS NECTA 2011

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2011

Whenever necessary use thefollowing constants:

Density of water = lg/cm3 or 1000kg/m3

Acceleration due to gravity: g = 10m/s2

Density of mercury = 13.6g/cm3 or 136000kg/m3

SECTION A

1. Write the letter of the correct answer in the box provided.

 (i) The following are fundamental quantities in mechanics except:

  1. .length
  2. .mass
  3. .time
  4. .weight
Choose Answer :


(ii) Which of the following groups represent forces?

  1.  Acceleration, energy and light 
  2.  Energy, heat and upthrust
  3.  Friction, gravity and upthrust 
  4.  Gravity, light and velocity
Choose Answer :


(iii)Sustainable energy sources are:

  1.  biogas, kinetic energy and petrol
  2. biogas, tidal energy and water energy
  3. firewood, petrol and tidal energy
  4. kerosene, nuclear energy and water energy
Choose Answer :


(iv)The best test for a magnetized material is:

  1.   attraction
  2. friction
  3. heating
  4. .repulsion
Choose Answer :


(v)The type of light beam produced by the sun is:

  1.  converging
  2.  diverging
  3.  parallel
  4.  radial
Choose Answer :


 (vi) What makes the last drop of tap water remain hanging for sometime at the outlet of the tap soon after closing the tap?

  1.  Capillarity 
  2.  Osmosis
  3.  Surface tension 
  4.  Viscosity
Choose Answer :


 (vii)A vernier caliper reads 6.23cm. The reading in millimeters on the vernier scale is:

  1.  0.03 
  2.  0.3 
  3. . 2.3 
  4. . 6.2
Choose Answer :


(viii)A clinical thermometer differs from other thermometers because it:

  1.  can be used to measure the temperature of ice 
  2.  can be used to measure the temperature of melting iron 
  3.  .has a constriction
  4. .is very small
Choose Answer :


(ix)A potential difference of 12V is applied across a resister of 1200, The current in circuit is:

  1.  0.1A 
  2.  10A 
  3.  132A 
  4.  440A
Choose Answer :


(x)A plane mirror always forms:

  1. inverted virtual image
  2. magnified lateral image
  3. real lateral image
  4. virtual lateral image
Choose Answer :


(xi)The volume of a piece of metal with a mass of 150g and density of 0.03g/cm3 is:

  1.  5 x 10-3 cm 3
  2.  5 x 10 1 cm 3
  3.  5 x 10 2 cm 3
  4.  5 x 10 3 cm3
Choose Answer :


(xii)A liquid at 100 0 C is as hot as:

  1.  200 0
  2.  212 0
  3.  219 0
  4.  2600F
Choose Answer :



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

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


(xiv)When charging bodies by friction, the particles which are transferred are:

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


(xv) First Aid is an immediate assistance or care given to a sick person or an accident victim before getting:

  1. help from nearby people
  2. professional medical help
  3. relatives and friends assistance 
  4. traditional medical care
Choose Answer :


(xvi)The area under the velocity-time graph represents:

  1. acceleration 
  2. distance covered 
  3. speed 
  4. velocity
Choose Answer :


(xvii)A machine has a velocity ratio of 15. If an effort of ION is applied to lift a load of 50N, its efficiency is approximately equal to:

  1. 20%
  2. 33%
  3. 50%
  4. 75%
Choose Answer :


(xviii)When reading the volume of water in a burette, one needs to look at the:

  1. highest point of the meniscus
  2. lowest point of the meniscus
  3. mid point of the highest meniscus 
  4. mid point of the lowest meniscus
Choose Answer :


(xix)The property of a material to recover its original shape and size on removal of a stretching force is called:

  1.  compression 
  2.  elasticity
  3.  elastic limit 
  4.  plasticity
Choose Answer :


(xx)When buying sugar from a shop you pay for its:

  1. density 
  2.  mass
  3.  volume 
  4.  weight
Choose Answer :


SECTION B

2. Match each item in List A with a response in List B by writing its letter below the number of the corresponding item in the table provided.

LIST A LIST B
  1. Angle between geographic axis and the magnetic axis.
  2. Anomalous expansion of water
  3. Converts sound to electrical energy
  4. Earth between sun and moon
  5. Material between the plates of a. capacitor
  6. Measures liquid pressure
  7. Measures the density of liquids
  8. Submarines, canoes, ships and M. balloons
  1. Angle of declination
  2. Angle of elevation
  3. Between 00C and 40C
  4. Capacitors
  5. Dielectric
  6. Eclipse of the sun
  7. Floating objects
  8. Gas pressure
  9. Hydrometer
  10. Hygrometer
  11. Lunar eclipse
  12. Manometer
  13. Microphone
  14. Transformer
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3. Complete each of the following statements by writing the correct answer in the spaces provided:

(a)In magnetism, points where the net magnetic field is zero are called

(b)The number of images (n) formed between mirrors placed at 90, is given by the formula n = .....

(c)(i) Sea-wave energy is a result of .

(ii) Geothermal energy is 

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4. (a) Define the term "electrostatics".

(b) Draw a diagram of the gold-leaf electroscope and label the following: brass cap, insulator, earthed metal case, gold leaf, brass plate and brass rod.

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 5 (a) - Define the term "simple machine".

(b) Write down the velocity ratio of the following simple machines:

(i) Inclined plane

(ii) A pulley system

(c) Why musta liquid and nota gas be used as fluid in a hydraulic machine? Give two reasons.

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6. (a) State Ohms law.

(b) A cell of8V is connected in series with a resistor of 30. What is the value of the current through the resistor?

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SECTION C

7.(a) Define the term "centre of gravity".

(b) A uniform half-metre rule is freely pivoted at 15cm mark and it balances  horizontally when a body of mass of 40g is hung from a 2cm mark.

(i)Draw a clearly labelled diagram to illustrate the forces on a halfmetre rule.

(ii)Calculate the mass of the rule.

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8.An object starts from rest and moves with a velocity of 20m/s for 5 seconds. It maintains this speed for 20 seconds before applying brakes, and comes to rest after 10 seconds.

(a)Sketch the velocity-time graph for this motion.

(b)From the graph drawn in part (a) above, find:

(i)Acceleration

(ii)Deceleration

Calculate the total distance covered for the whole motion.

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9.(a) What is energy?

(b) State the principle of conservation of energy.

 (c) A motor exerts a horizontal force of 200N in pulling a box 10m across a level floor. How much work did the motor do?

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10. (a) State Archimedes principle.

(b) A body weighs ION in air and 8N when completely immersed in a liquid of density 0.8g/cm3. Find:

(i)The volume of the liquid displaced

(ii)The density of the body

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