Second Term Examination
Class : SSS 1
Subject : Physics
Name : ___________________________________
Section A : Objective Questions
Instruction : Read the question carefully and pick from the options lettered a – d.
1. Which of the following is not an effect of heat? A. expansion B. contraction
C. change of state. D. increase in weight
2. Temperature can be measured in the following units except A. degree celsius
B. kelvin C. degree Fahrenheit D. centigrade-meter.
3. When heat is extracted from water it changes from liquid to gas. What is this process called? A. condensation B. evaporation C. sublimation D. freezing
4. The process of by which a gas is converted to a solid is called ____________ A. condensation B. evaporation C. sublimation D. freezing
5. Fahrenheit is a unit of ________________. A. heat B. temperature C. freezing D. melting
6. Gaps are left in the construction of railway tracks to give room for _________.
A. contraction B. evaporation C. expansion D. vaporization
7. When hot water is poured in a glass tumbler, it might crack due to the of the inner walls of the tumbler A. even expansion B. uneven expansion C. uneven contraction D. even contraction
8. The stopper of a bottle can be removed due to the ___________ of the glass.
A. contraction B. expansion C. evaporation D. none of the above
9. The following are advantages of thermal expansion of solids except ___________. A. bimetallic thermometer B. fire alarm C. sagging of overhead wire D. fitting of wheels in rims
10. If heat is removed from solids they ___________. A. contract B. evaporate C. expand D. none of the above
11. The clinical thermometer is characterized by having a ______________ A. wide range of temperature B. wide bore C. long stem D. constriction
12. A short response time is obtained in a liquid – in-glass thermometer when the A. bulb is large and thick walled B. bulb is small and thin walled C. stem is long and thin D. bulb is thin walled and the liquid is a good conductor of heat.
13. Change in volume with temperature is the physical property of ____________ thermometer. A. constant volume gas B. liquid-in-glass C. resistant
D. thermoelectric
14. Convert 27°C to kelvin A. 29°K B. 30°K C. 300°C D. 31°K
15. The following are units of temperature except A. kelvin B. degree Celsius C. ampere D. Fahrenheit
16. The anomalous expansion of water takes place between/at ______________. A. 1°C and 4°C B. 0°C and 4°C C. 4°C and 25°C D. all temperature
17. The SI unit of linear expansivity is ____________. A. per Celsius B. per Fahrenheit C. per Kelvin D. per Joules
18. If the linear expansivity of a solid is 1.8 X 10 -6 k-¹, the area expansivity will be _________. A. 0.9 X 10-6 B. 3.6 X 10-6 C. 1.8 X 10-6 D. 5.4 X 10-6
19. A metal of length 15.01m is heated until its temperature rises by 60°C. If its new length is 15.05, calculate its linear expansivity
A. 0.0004/K B. 0.00004/K C. 0.004/K D. 0.04/K
20. The increase in volume of 10cm³ of mercury when the temperature rises by 100°C is 0.182cm3. What is the cubic expansivity of mercury? A. 0.000182/K B. 0.0000182/K C. 0.000187/K D. 0.000178/K
21. The silver surface of a thermos flask minimizes heat loss by _____________. A. Conduction B. radiation C. convection D. evaporation
22. Is it advisable to wear a dark shirt in the tropical sun? A. yes it is B. No it is not C. Cannot say D. All of the above
23. The following are good conductors of heat except _____________. A. steel B. aluminum C. copper D. wool
24. The thermal conductivity of copper is greater than lead _____________. A. true B. false C. cannot say D. none of the above
25. A stone floor feels warm to the feet but a rug or a carpet on the same floor feels cold ______________. A. true B. false C. cannot say D. none of the above
26. Electrophorus and capacitor can store charges A. true B. false C. cannot say D. none of the above
27. When an ebonite rod is rub with fur, the fur becomes __________ A. positively charge B. negatively charge C. neutral D. none of the above
28. The ebonite rod in the above questions becomes _________. A. positively charge B. negatively charge C. neutral D. none of the above
29. Like charges ______________ A. attract B. repel C. disappear D. evaporate
30. Charges are unusually concentrated at places where the surface is ___________
A. straight B. sharply curved C. oval in shape D. none of the above
31. ____________ is a device use to detect charge A. Electrophorus B. Capacitor
C. Electroscope D. Inductor
32. A lighting conductor is used to protect a building from lighting damage. A. true
B. false C. cannot say D. none of the above
33. _____________ is the sensitive part of an electroscope A. The casing B. The cap C. The gold leaf D. The brass rod
34. The casing of an electroscope is earthed so as to screen the leaf from ____________ outside interference A. positively charge B. negatively charge C. neutral D. none of the above
35. Capacitor is a device that ___________ charges A. produces B. emits C. store D. none of the above
36. The SI unit of flux density is _________ A. cm2 B. cm C. cm-2 D. cm-¹
37. Electric potential is a scalar quantity A. true B. false C. cannot say D. none of the above
38. Electric field intensity is a scalar quantity A. true B. false C. cannot say D. none of the above
39. The SI unit of electric potential energy is _________ . A. volt B. Joules per coulomb C. Joules D. Centimeter square
40. Line of force are maginary A. true B. false C. cannot say D. none of the above
41. Cell convert chemical energy into ________ energy A. mechanical B. electrical C. solar D. atomic
42. DC generator convert _____________. A. electric to mechanical energy B. mechanical to electric energy C. solar to electrical energy D. none of the above
43. Thermocouple consist of two A. similar metals B. dissimilar metals C. alloys metals D. none of the above.
44. The feature that produces magnetic flux in a generator is ______ A. Amature
B. magnet C. stator D. prime mover
45. Conversion of mechanical energy into electrical energy in a dc generator is base on what principle A. moment B. faradays law of electromagnetic induction C. coulombs law D. fundamental law of electrostatic.
THEORY
1a. The force acting on an electron carrying a charge of 1.6 x 10-19 C in an electric field of intensity 5 x 10 8 Vm-1.
If 20MJ of work is done in moving a 5µC of charge between two points in an electric field, the potential difference between the two points is?
1b. With the aid of a diagram, describe how mechanical energy is converted to electrical energy.
2ai. Define magnetic field.
2aii.Define gravitational field.
2aiii. How does acceleration vary with latitude
2bi Explain what is meant by a field as used in physics.
2bii. Mention three types of field known to you
3a. Explain the two uses of an electroscope.
3b.Draw a well label diagram of an electroscope.