Second Term Physics Examination for SSS 1

Examination on Physics

Class: SSS 1

Term: Second Term

Time: 1 Hour

Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)

Instruction: Answer all questions.

1. ________ is the degree of hotness or coldness of a body. (a) Heat (b) Temperature (c) Energy (d) Expansion

2. The increase in length per unit length per unit rise in temperature is the ________. (a) Linear expansivity (b) Area expansivity (c) Volume expansivity (d) Cubic expansivity

3. Which of the following is a consequence of the expansion of solids? (a) Cooling of water (b) Cracking of thick glass (c) Evaporation (d) Melting of ice

4. The process of heat transfer through a material medium without the actual movement of the particles is ________. (a) Convection (b) Radiation (c) Conduction (d) Evaporation

5. An example of a substance that can be charged by friction is ________. (a) Iron (b) Copper (c) Ebonite rod (d) Aluminum

6. Which of the following surfaces is a better absorber of radiant heat? (a) White surface (b) Polished surface (c) Dull black surface (d) Silver surface

7. The ________ is a region where a body experiences a force. (a) Power (b) Field (c) Work (d) Energy

8. All of these are types of fields except ________. (a) Magnetic field (b) Electric field (c) Gravitational field (d) Thermal field

9. Which is NOT a method of producing electric charges? (a) Friction (b) Induction (c) Conduction (d) Vibration

10. The ________ is used to protect tall buildings from lightning strikes. (a) Resistor (b) Lightning conductor (c) Ammeter (d) Voltmeter

11. Which of these is not a property of gravitational fields? (a) It is attractive (b) It depends on mass (c) It is repulsive (d) It obeys inverse square law

12. The main reason for Brownian motion is ________. (a) Gravity (b) Constant bombardment by fast moving molecules (c) Surface tension (d) Magnetic pull

13. The ________ is the basic unit of matter. (a) Molecule (b) Atom (c) Ion (d) Compound

14. Which of the following substances has a regular arrangement of atoms? (a) Glass (b) Plastic (c) Sodium chloride (d) Rubber

15. The correct step in determining acceleration due to gravity in the lab is ________. (a) Use of a ticker-timer (b) Use of a thermometer (c) Use of an ammeter (d) Use of a magnet

16. The ________ states that the current flowing through a metallic conductor is directly proportional to the potential difference. (a) Newton’s Law (b) Ohm’s Law (c) Boyle’s Law (d) Hooke’s Law

17. An example of a crystalline substance is ________. (a) Graphite (b) Coal (c) Coke (d) Charcoal

18. Which of these is a property of electric lines of force? (a) They cross each other (b) They start from negative to positive (c) They never cross each other (d) They are parallel to the surface

19. The ________ is the instrument used to measure electric current. (a) Voltmeter (b) Ammeter (c) Galvanometer (d) Ohmmeter

20. All of these are states of matter except ________. (a) Solid (b) Liquid (c) Gas (d) Vacuum

21. ________ is the movement of particles from a region of higher concentration to lower concentration. (a) Diffusion (b) Osmosis (c) Brownian motion (d) Capillarity

22. The relationship between Area expansivity ($\beta$) and Linear expansivity ($\alpha$) is ________. (a) $\beta = \alpha$ (b) $\beta = 2\alpha$ (c) $\beta = 3\alpha$ (d) $\beta = \alpha/2$

23. Which of the following is an amorphous substance? (a) Diamond (b) Sugar (c) Glass (d) Copper sulphate

24. The ________ is responsible for the shape of the earth being an oblate spheroid. (a) Gravitational field (b) Magnetic field (c) Rotation of the earth (d) Atmospheric pressure

25. An example of heat transfer by convection is ________. (a) Heating a metal rod (b) Land and sea breezes (c) Heat from the sun (d) Warming by a fireplace

26. Which of the following determines the distribution of charges on a conductor? (a) Mass (b) Surface curvature (c) Temperature (d) Volume

27. The ________ is the unit of potential difference. (a) Ampere (b) Ohm (c) Volt (d) Watt

28. All of these are evidences of the particle nature of matter except ________. (a) Diffusion (b) Brownian motion (c) Photosynthesis (d) Crystal structure

29. Which is NOT a method of heat transfer? (a) Expansion (b) Conduction (c) Convection (d) Radiation

30. The ________ are used to store electric charges. (a) Resistors (b) Capacitors (c) Inductors (d) Switches

31. Which of these is a vector field? (a) Temperature field (b) Electric field (c) Pressure field (d) Density field

32. The main reason for the use of bimetallic strips in thermostats is ________. (a) High melting point (b) Difference in expansivities (c) Good conductivity (d) Magnetic properties

33. The ________ is the formula for electrical work done ($W$). (a) $W = IVt$ (b) $W = IR$ (c) $W = V/R$ (d) $W = I/V$

34. Which of the following is a scalar quantity? (a) Electric field intensity (b) Magnetic flux density (c) Temperature (d) Gravitational field strength

35. An example of a substance that undergoes diffusion is ________. (a) Wood (b) Iron (c) Perfume (d) Stone

36. The ________ is the central part of an atom containing protons and neutrons. (a) Shell (b) Electron (c) Nucleus (d) Orbit

37. Which of these is not a consequence of expansion? (a) Sagging of telegraph wires (b) Gaps in railway lines (c) Bursting of water pipes (d) Melting of wax

38. The ________ is the effect of heat that leads to a change in state. (a) Increase in temperature (b) Expansion (c) Latent heat (d) Radiation

39. Which of the following is used to visualize a magnetic field? (a) Water (b) Iron filings (c) Sand (d) Oil

40. The ________ is the acceleration due to gravity on the earth’s surface. (a) $5.0 ms^{-2}$ (b) $9.8 ms^{-2}$ (c) $15.0 ms^{-2}$ (d) $20.0 ms^{-2}$

SECTION B: THEORY (30 Marks)

Instruction: Answer any THREE questions.

Question 1

(a) Define linear expansivity and state its unit. (2 marks)

(b) Explain the process of heat transfer by convection in liquids. (3 marks)

(c) Distinguish between crystalline and amorphous substances with one example each. (3 marks)

(d) State two effects of heat on a substance. (2 marks)

Question 2

(a) Define an electric field. (2 marks)

(b) State Ohm’s law and write its mathematical expression. (3 marks)

(c) Describe how a body can be charged by induction. (3 marks)

(d) Mention two properties of electric lines of force. (2 marks)

Question 3

(a) What is gravitational field? (2 marks)

(b) Briefly explain Brownian motion as evidence of the particle nature of matter. (3 marks)

(c) A metal rod of length 2.0m is heated from 30°C to 80°C. If its linear expansivity is $2.0 \times 10^{-5} K^{-1}$, calculate the new length. (3 marks)

(d) State two applications of a lightning conductor. (2 marks)

Question 4

(a) Define the term “Diffusion”. (2 marks)

(b) Explain how heat is transferred from the sun to the earth. (3 marks)

(c) List the three states of matter and describe their molecular arrangements. (3 marks)

(d) Give two consequences of expansion in daily life. (2 marks)

Question 5

(a) Define potential difference and state its S.I unit. (2 marks)

(b) Distinguish between conduction and radiation as modes of heat transfer. (3 marks)

(c) Calculate the work done when a current of 2A flows through a resistor for 10 seconds under a p.d of 12V. (3 marks)

(d) Mention two types of fields you have studied. (2 marks)

Objective Marking Scheme

Question 1 – ✅ (b) Temperature

Question 2 – ✅ (a) Linear expansivity

Question 3 – ✅ (b) Cracking of thick glass

Question 4 – ✅ (c) Conduction

Question 5 – ✅ (c) Ebonite rod

Question 6 – ✅ (c) Dull black surface

Question 7 – ✅ (b) Field

Question 8 – ✅ (d) Thermal field

Question 9 – ✅ (d) Vibration

Question 10 – ✅ (b) Lightning conductor

Question 11 – ✅ (c) It is repulsive

Question 12 – ✅ (b) Constant bombardment by fast moving molecules

Question 13 – ✅ (b) Atom

Question 14 – ✅ (c) Sodium chloride

Question 15 – ✅ (a) Use of a ticker-timer

Question 16 – ✅ (b) Ohm’s Law

Question 17 – ✅ (a) Graphite

Question 18 – ✅ (c) They never cross each other

Question 19 – ✅ (b) Ammeter

Question 20 – ✅ (d) Vacuum

Question 21 – ✅ (a) Diffusion

Question 22 – ✅ (b) $\beta = 2\alpha$

Question 23 – ✅ (c) Glass

Question 24 – ✅ (c) Rotation of the earth

Question 25 – ✅ (b) Land and sea breezes

Question 26 – ✅ (b) Surface curvature

Question 27 – ✅ (c) Volt

Question 28 – ✅ (c) Photosynthesis

Question 29 – ✅ (a) Expansion

Question 30 – ✅ (b) Capacitors

Question 31 – ✅ (b) Electric field

Question 32 – ✅ (b) Difference in expansivities

Question 33 – ✅ (a) $W = IVt$

Question 34 – ✅ (c) Temperature

Question 35 – ✅ (c) Perfume

Question 36 – ✅ (c) Nucleus

Question 37 – ✅ (d) Melting of wax

Question 38 – ✅ (c) Latent heat

Question 39 – ✅ (b) Iron filings

Question 40 – ✅ (b) $9.8 ms^{-2}$