PHYSICS FORM TWO – MID / FINAL EXAMINATION | Smart Education Tanzania

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PHYSICS FORM TWO – MID / FINAL EXAMINATION

Instructions:
- Answer all questions in Section A and Section B.
- Answer any three (3) questions from Section C.
- Show all necessary working clearly.
- Use NECTA examination standards.

SECTION A: MULTIPLE CHOICE QUESTIONS (10 Marks)

Choose the correct answer and write its letter beside the question number.

  1. Which instrument is most suitable for measuring the diameter of a thin wire?
    A. Ruler
    B. Vernier calipers
    C. Micrometer screw gauge
    D. Measuring tape
  2. The SI unit of force is:
    A. Newton
    B. Joule
    C. Pascal
    D. Kilogram
  3. Which of the following is NOT a property of light?
    A. It travels in a straight line
    B. It can be reflected
    C. It has mass
    D. It can be refracted
  4. Archimedes’ Principle states that:
    A. A body immersed in a fluid experiences an upward force equal to the weight of the fluid displaced.
    B. Pressure in a fluid increases with depth.
    C. The volume of a solid equals the volume of water displaced.
    D. The density of a fluid is constant.
  5. Which of the following is a unit of temperature?
    A. Joule
    B. Kelvin
    C. Newton
    D. Watt
  6. Which of the following is a vector quantity?
    A. Mass
    B. Speed
    C. Force
    D. Temperature
  7. The density of a substance is defined as:
    A. Mass per unit volume
    B. Weight per unit volume
    C. Volume per unit mass
    D. Force per unit area
  8. Which instrument is used to measure temperature in a laboratory?
    A. Hygrometer
    B. Thermometer
    C. Barometer
    D. Manometer
  9. When light passes from air to glass, it:
    A. Speeds up
    B. Slows down
    C. Remains constant
    D. Disappears
  10. Which of the following is NOT a state of matter?
    A. Solid
    B. Liquid
    C. Gas
    D. Energy

SECTION B: SHORT ANSWER QUESTIONS (20 Marks)

Answer all questions in this section.

  1. Define measurement and give two examples of physical quantities.
  2. State two differences between mass and weight.
  3. Explain why a needle can float on water even though it is made of steel.
  4. State two applications of reflection of light in daily life.
  5. What is the normal body temperature of a healthy human being in degrees Celsius?
  6. Give two differences between solids and gases in terms of particle arrangement.

SECTION C: LONG ANSWER / STRUCTURED QUESTIONS (30 Marks)

Answer any three (3) questions from this section.

  1. (a) Define force.
    (b) A box of mass 20 kg is pushed with a force of 50 N. Calculate the acceleration produced. (Take g = 10 m/s²)
  2. (a) State Archimedes’ Principle.
    (b) A stone of weight 12 N is immersed in water and experiences an upthrust of 4 N. Calculate its apparent weight in water.
  3. (a) Define density.
    (b) A block has a mass of 240 g and a volume of 80 cm³. Calculate its density in g/cm³ and kg/m³.
  4. (a) Explain the difference between heat and temperature.
    (b) A thermometer reads 30°C. Convert this temperature into Kelvin.

END OF EXAM – GOOD LUCK

PHYSICS FORM TWO – ANSWERS / MARKING SCHEME

SECTION A: Multiple Choice Answers

  1. C
  2. A
  3. C
  4. A
  5. B
  6. C
  7. A
  8. B
  9. B
  10. D

SECTION B: Short Answers

  1. Measurement is the process of determining the size, length, or amount of a physical quantity. Examples: length, mass.
  2. Mass is the amount of matter in a body; weight is the force due to gravity. Mass is constant, weight varies with location.
  3. Because of surface tension of water which supports the needle.
  4. Applications: mirrors, periscopes, car rear-view mirrors.
  5. 37°C.
  6. Solids: particles closely packed, fixed shape. Gases: particles far apart, no fixed shape.

SECTION C: Long Answers

  1. (a) Force is a push or pull acting on a body.
    (b) Acceleration = Force / Mass = 50 N / 20 kg = 2.5 m/s².
    Marking points:
    - Correct formula (1 mark)
    - Substitution (1 mark)
    - Correct answer (1 mark)
  2. (a) Archimedes’ Principle: A body immersed in a fluid experiences an upthrust equal to the weight of fluid displaced.
    (b) Apparent weight = Actual weight – Upthrust = 12 N – 4 N = 8 N.
    Marking points:
    - Statement of principle (2 marks)
    - Correct calculation (2 marks)
  3. (a) Density is mass per unit volume.
    (b) Density = 240 g / 80 cm³ = 3 g/cm³.
    Convert to kg/m³: 3 g/cm³ = 3000 kg/m³.
    Marking points:
    - Correct formula (1 mark)
    - Substitution (1 mark)
    - Correct answer in g/cm³ (1 mark)
    - Conversion to kg/m³ (1 mark)
  4. (a) Heat is energy transferred due to temperature difference; temperature is the degree of hotness of a body.
    (b) Kelvin = 30 + 273 = 303 K.
    Marking points:
    - Clear distinction (2 marks)
    - Correct conversion (2 marks)

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