This paper consists of 100 questions. Answer all questions
1. Find the total reading from each of the following calibrated apparatus
2. Draw a well labelled diagram of a Micrometer screw gauge
3. Mention two functions of micrometer screw gauge.
4. How fundamental quantity differ from derived quantity?
5. …………..is a measure of estimated difference between the observed and true value of a quantity that is being measured/observed.
6. State the principle conservation of energy.
7. When does force do work? How is this work measured?
8. Explain how chemical energy changes into heat energy.
9. Differentiate between work and energy.
10. A body of 50kg is raised through a distance of 3.0m above the ground. What is the power required within 5 seconds.
11. Draw the Lunar Eclipse.
12. What is the difference between umbra and penumbra?
13. By using diagram show on how the regular reflection occur?
14. Differentiate between Translucent material and Opaque materials.
15. What is the difference between up thrust and apparent weight loss?
16. Define Laboratory
17. What is the mass of one litre (1000 cm3) of cottonseed oil of density 926 kg/m3? How much does it weigh?
18. Mention six Laboratory rules.
19. A block of glass of mass 187.5 g is 5.0 cm long, 2.0 cm thick and 7.5 cm high. Calculate the density of the glass in kgm-3.
20. The density of concentrated sulphuric acid is 1.8 g/cm-3. Calculate the volume of 3.1 kg of the acid.
21. What is warning sign?
22. Why it is important to label containers with a warning sign symbols
23. Draw a warning sign which represents the followings
(i) No smoking (ii) Switch off your mobile phone
24. Density of mercury is 13600 g/cm-3. Calculate the density of mercury in S.I UNIT.
25. Convert the following into S.I Unit ( i.) 100 g (ii) 0.005 tonnes (iii) 24 years
26. A body has 860 N on the earth surfaces. Calculate the weight of the body on the planet having acceleration due to gravity half that on the earth surface.
27. Mention five (5) laboratory apparatus and their uses
28. Distinguish between mass and weight (5 points)
29. List three state of matter and give one example to each
30. Define the term elastic material
31. A – Spring balance has a scale pan of 0.6N weight attached to it. A load of 1.5N placed on the pan extends the spring 21mm from its original unscratched length. Calculate the load on the scale – pan when the extension is 14mm, (Assume the elastic limit is not exceeded)
32. What is pressure?
33. Convert the following into N/m2
Ø 980 mm Hg
Ø 3.2 atmosphere
Ø 700,000 Pa
34. A hydraulic press has two pistons of 0.2 cm2 and 4.0 cm2 with 20 n force applied in the small piston.
Ø Calculate the pressure and force in a larger piston
Ø Suppose fluid falls by 30 mm in small piston, how far will it raise in the larger piston?
35. State the Law of floatation
36. Mention two (2) conditions for a body to float.
37. Explain why the body weighs less when submerged in liquid?
38. A ship of mass 1200 tones floats in sea water. What volume of sea water does it displace? If the ship enters fresh water, what mass of cargo must be unloaded so that the same volume of water of water is displaced as before? Density of sea water = 1025 kg/m3 and density of fresh water = 1000 kg / m3.
39. Define
Ø Measurement
Ø First aid kit
40. List down five effects of force
41. Mention three importance of force
42. Define the term elasticity
43. State Hooke’s law
44. Mention the applications of :
Ø Diffusion
Ø Capillarity
45. A cube of wood of sides 5.0cm and density 600 kg⁄m3 is placed in water. Find
Ø Up thrust exerted by the water
Ø Apparent weight of wood
Ø What fraction of the wood will be immersed in water?
Ø What force must be applied to the cube so that the top surface of the cube is on the same level as the water surface?
46. Why it is painful to walk barefoot on a road that is covered by pebbles?
47. What is barometer?
48. State three applications of atmospheric pressure
49. A wood weights 30N and have dimensions of 5m by 10m by 4m. Find:-
Ø Maximum pressure
Ø Minimum pressure
50. Define light
51. State laws of reflection of light
52. Mention and draw three types of beam of light
53. With the aid of diagram illustrate the following
Ø Regular reflection
Ø Irregular reflection
54. Mention four properties of image formed in a plane mirror
55. Explain the terms opaque and translucent and give one example of each
56. In the diagram below. Find
Ø The angle of incidence (i⁰)
Ø The angle of reflection (r⁰)
57. Find the number of image formed when two plane mirror are inclined at angle
Ø 90⁰
Ø 60⁰
58. Define the term physics
Ø Why do we study physics? (four points)
Ø Briefly explain where we can apply the knowledge of physics (three points)
59. Define the term force and give its SI unit
60. Mention four types of fundamental forces
61. What is the meaning of (g =10 N/kg) and (g = 10 m/s2)
62. Define laboratory as used in physics
63. Distinguish between potential energy and kinetic energy
64. An object has a mass of 5kg. What it its kinetic energy if its speed is 4m/s?
65. Define the following terms
v Conductor
v Insulator
66. Two resistor of 3Ω and 6Ω are connected in parallel and then in series with battery and switch.
v Draw a schematic diagram
v What is the total resistance of the circuit?
v If the current across the circuit is 5A calculate its p.d
67. Mention types of charges
68. State “fundamental law of electrostatic”.
69. What is electrophorus?
70. Mention three uses of electrophorus.
71. What is the difference between capacitor and capacitance?
72. Capacitors of capacitance 3μF and 5μF are connected in series. Calculate the equivalent capacitance.
73. A Capacitor of capacitance 250μF is allowed to be charged until the potential difference between its plates is 10V. How much charge accumulates on the plates during the charging process?
74. Mention three factors affecting the capacitance of the capacitors.
75. What will happen when ebonite is rubbed with fur?
76. What is meant by the term
v Thunderstorm
v Radar
77. It is required to obtain effective capacitance of 3μF, there are two capacitors; the first is 12μF, what will be the value of the other capacitor. State the way it will be connected to the first.
78. Find the effective capacitance for the following arrangement of capacitors
79. Define the following terms
ü Lightning
ü Lightning conductor
80. Mention three methods use to charge the uncharged body
81. Given the Gold leaf electroscope which is charged positively, then explain what will happen to the gold leaf when the following spheres are placed on top of the metal cap.
v Positively charged sphere
v Negatively charged sphere
82. Draw the symbol of the following component
v Cell, Resistors connected in series, Capacitor, Lamp or Bulb, Battery and Field lines of force for two magnets placed close to each other
83. Define the terms
Ø Magnetization
Ø Demagnetization
84. List three ways in which material can be magnetized
85. List four ways of removing magnet from a material
86. What is resistance?
87. State three factors affecting the resistance of a conductor if temperature is kept constant
88. A piece of metal of volume 16 cm3 and mass 96 g. calculate (i) density (ii) its R.D
89. A man whose mass is 75 kg walked 12 steps of 20 cm each in 5 seconds. Find work done and power
90. A density bottle of mass 100 g weight 200 g, when full of water. What would it weight when full of mercury of R.D 13.6?
91. Differentiate between osmosis and diffusion
92. What are the differences between derived physical quantities and fundamental quantities? List four example for each
93. Briefly explain the following observations.
v A hydrometer has wide bulb, thin hollow stem and a loaded end.
v A ship made of steel does not sink but a nail made of steel sinks in water.
94. Define relative density in terms of mass of a substance.
95. A metal cube of mass 480g and density 8g/cm3 is suspended by a string so that is half immersed in a liquid of density 0.9g/cm3. Find the tension in the string.
96. State law of buoyancy
97. A boulder is thrown into a deep lake. As it sinks deeper and deeper into water, does the buoyancy force change? If yes or not, explain why?
98. A piece of wood of relative density 0.25 floats in a pail containing oil of relative density 0.81. What is the percentage volume of the wood above the surface of the oil?
99. Define the following terms
v One Joule
v One newton
100. Calculate the average horsepower to raise a 150 kg drum to a height of 20m in a time of 1 minute.
Credit to Nofly Junior ||+255 629 12 69 12||PHYSICS DEPT.||MWITANI HIGH SCHOOL