FORM TWO PHYSICS NECTA 2012

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATION COUNCIL

 PHYSICS FTNA 2012

SECTION A

(i) Physics can be defined as the study of:

  1. behaviour of living things
  2. composition and decomposition of matter
  3. man and his environment
  4. matter in relation to energy
Choose Answer :


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

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


(iii) A force exerted by a pressure of 20Pa acting over an area of 2m2 is:

  1. ION
  2. 18N
  3. 22N
  4. 40N
Choose Answer :


(iv) A Bunsen burner has a massive and wide base in order to:

  1. lower its centre of gravity
  2. make it give out good flame
  3. raise its centre of gravity
  4. support it on the surface
Choose Answer :


(v) A body which gains electrons will attract a:

  1. body which has gained neutrons
  2. negatively charged body
  3. neutral body
  4. positively charged body
Choose Answer :


(vi) Pressure in a liquid contained in a vessel depends on:

  1. density
  2. depth
  3. mass
  4. surface area
Choose Answer :


(vii)The energy from hot rocks within the earth is called:

  1. biomass
  2. coal-burning
  3. geothermal
  4. tidal
Choose Answer :


(viii)Materials which allow only a small portion of light to pass through are called:

  1. opaque
  2. penumbra
  3. translucent
  4. transparent
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(ix)Measurement of mass using an equal arm balance lever is an application of the principle of:

  1. conservation of energy
  2. conservation of linear momentum
  3. conservation of mass
  4. moments
Choose Answer :


(x)A current of 0.2A flows through a resistor of 200. The potential difference across the resistor is:

  1. 0.04V
  2. 4V
  3. 40V
  4. D. 400V
Choose Answer :


(i) Physics can be defined as the study of:

  1. behaviour of living things
  2. composition and decomposition of matter
  3. man and his environment
  4. matter in relation to energy
Choose Answer :


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

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


(iii) A force exerted by a pressure of 20Pa acting over an area of 2m2 is:

  1. ION
  2. 18N
  3. 22N
  4. 40N
Choose Answer :


(iv) A Bunsen burner has a massive and wide base in order to:

  1. lower its centre of gravity
  2. make it give out good flame
  3. raise its centre of gravity
  4. support it on the surface
Choose Answer :


(v) A body which gains electrons will attract a:

  1. body which has gained neutrons
  2. negatively charged body
  3. neutral body
  4. positively charged body
Choose Answer :


(vi) Pressure in a liquid contained in a vessel depends on:

  1. density
  2. depth
  3. mass
  4. surface area
Choose Answer :


(vii)The energy from hot rocks within the earth is called:

  1. biomass
  2. coal-burning
  3. geothermal
  4. tidal
Choose Answer :


(viii)Materials which allow only a small portion of light to pass through are called:

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


(ix)Measurement of mass using an equal arm balance lever is an application of the principle of:

  1. conservation of energy
  2. conservation of linear momentum
  3. conservation of mass
  4. moments
Choose Answer :


  1. 0.04V
  2. 4V
  3. 40V
  4. D. 400V
Choose Answer :


(xi)Strong and permanent magnets are made up of:

  1. aluminium and nickel
  2. cobalt and nickel
  3. iron and magnesium
  4. nickel and silver
Choose Answer :


(xii)A lever which has its fulcrum between effort and load is said to be of:

  1. First class
  2. Fourth class
  3. Second class
  4. Third class
Choose Answer :


(xiii)Which of the following is true about atmospheric pressure?

  1. Decreases as one moves above the sea level
  2. Increases as one moves above the sea level
  3. Is greater than ones internal body pressure
  4. Is higher on the moon than on the earth
Choose Answer :


(xiv)The product of force and displacement is known as:

  1. energy
  2. momentum
  3. power
  4. work done
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(xv)A body moved a distance of 200cm in 2seconds. Its velocity in SI units was:

  1. 1m/s
  2. 100m/s
  3. 400m/s
  4. 4000m/s
Choose Answer :


(xvi)A passenger in a bus which starts to move forward tends to fall backwards. This phenomenon demonstrates:

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


(xvii)The boiling point of pure water at sea level is:

  1. 0 OF
  2. 100OF
  3. 2000F
  4. 2120F
Choose Answer :


(xviii)Forces that exist between molecules of the same substance are called:

  1. adhesive
  2. attractive
  3. cohesive
  4. repulsive
Choose Answer :


(xix)An image formed in a plane mirror is always:

  1. larger than the object
  2. smaller than the object
  3. real
  4. virtual
Choose Answer :


(xx)Motor vehicle tyres are made up of grooved rubber in order to:

  1. decrease speed of the vehicle on the road for safety purposes
  2. decrease stability of the tyres on the road
  3. increase friction between tyres and the road for safety braking
  4. increase speed of the vehicle on the road
Choose Answer :


SECTION B

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

LIST A LIST B

(i) Distance travelled per unit time

(ii)  Earth is between the sun and the moon 

(iii) Force is directly proportional to the extension

(iv)  Friction between the layers of fluids 

(v) Instrument for measuring electric cur­rent

(vi) Measures gas pressure

(vii) Momentum change

(viii) Thermodynamic temperature

  1. Ammeter 
  2. Capillarity 
  3. Fahrenheit 
  4. Hooke's law 
  5. Impulse 
  6. Kelvin
  7. Lunar Eclipse 
  8. Manometer 
  9. Moment 
  10. Speed
  11. Velocity 
  12. Viscosity

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3.(a) Differentiate between:

(i) Scalar and vector physical quantities 

 (ii) Kinetic and potential energies.

(b) Give two differences between mass and weight of an object.

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4.(a) Elasticity can be defined as .

(b) Mention two methods by which a magnetic substance can be turned into a magnet.

(c) Two types of intermolecular forces are:

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5. (a) Three states of matter are:

(b) Lubricants are mostly applied in machine parts in order to

(c) Draw magnetic lines of force of a bar magnet showing its poles.

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6.(a) Mention three states of equilibrium.

(b) Calculate the mechanical advantage of a simple machine which has a velocity ratio of 5 and efficiency of 80%.

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7.(a) Define each of the following terms as applied in physics:

(i)Work

(ii)Energy

(iii)Power

(iv)Density

(b) A force of ION acts on a stationary object of 5kg. This action causes an object to move along a smooth horizontal surface for 8 seconds before  stopping. What is the velocity of the object?

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8.(a) Explain briefly why:

(i)Water tanks have their outlets fixed at the bottom?

(ii)A tractor with wide tyres cannot easily get stuck in muddy places as compared to vehicles with narrow tyres.

(b)     Calculate the maximum pressure exerted by a block of mass 150kg and surface dimensions of 4m by 6m by 8m resting on the table.

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9.  State the following:

(i) Archimedes principle

(ii) Law of flotation

(b) A body has a mass of 120g and a volume of 100cm3. Will the body sink or float in water? Give reason for your answer.

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10.(a) State Ohms law.

 In the diagram below calculate the value of R.

A potential difference of I0V is applied across parallel resistors of 20 and 40. Calculate the current in the circuit.

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