K.C.S.E Physics Q & A - MODEL 2008PP1QN06&7
Fig. 3 shows a hot water bath with metal rods inserted through one of its sides. Some wax is fixed at the end of each rod. Use this information to answer questions 6 and 7.
​What property of metals could be tested using this set-up?
Besides the length of the rods that is kept constant, what else should be kept constant when comparing the property for the different metal rods?
answers
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K.C.S.E Physics Q & A - MODEL 2008PP1QN05
​ Fig: 2 shows a flask filled with water. The flask is fitted with a cork through which a tube is inserted. When the flask is cooled, the water level rises slightly, then falls steadily.
​Explain observation.
answer
K.C.S.E Physics Q & A - MODEL 2008PP1QN04Water is known to boil at 1000C. A student heated some water and noticed that it boiled at 1010C.
​State two possible reasons for this observation.
answer
K.C.S.E Physics Q & A - MODEL 2008PP1QN03
​Fig. 1 shows a brick placed on a plane inclined at an angle to the horizontal. The weight, W, of the brick is shown.
​a) On the same diagram show with arrows the other two forces acting on the brick and name them.
b) State how each of the two forces named (a) above is affected when the angle is reduced. K.C.S.E Physics Q & A - MODEL 2008PP1QN02The masses of equal volumes of a certain liquid and of water were found to be mv and mw respectively. Given that the density of water is 1gcm-3, express the density, p, of the liquid in terms of mv mw (show your work)K.C.S.E Physics Q & A - MODEL 2008PP1QN01
​A drug manufacturer gives the mass of the active ingredient in a tablet as 5 mg.
Express this quantity in kilogramme and in standard form. K.C.S.E Physics Q & A - MODEL 2007PP2QN14
​ You are provided with a diode, a resistor R, an a.c source of low voltage and connecting wires.
In the space provided, sketch the circuit diagram for a half – wave rectifier and indicate the terminals where the output voltage V0 may be connected. K.C.S.E Physics Q & A - MODEL 2007PP2QN13
​The following is part of radioactive decay series
​Determine the values of a and b
a = ……………………………………. b= ………………………………
answer
K.C.S.E Physics Q & A - MODEL 2007PP2QN11&12
​ The graph in figure 8 shows the variation of photoelectric current with applied voltage when a surface was illuminated with light of a certain frequency. Use the information in the figure to answer questions 11 and 12
​On the same axes, sketch the graph when light of higher intensity but same frequency is used to illuminate the surface.
Explain your answer in 11 above
K.C.S.E Physics Q & A - MODEL 2007PP2QN10
State what is meant by the term accommodation as applied to the human eye.
ANSWER
K.C.S.E Physics Q & A - MODEL 2007PP2QN09
​A heater of resistance R1 is rated P watts, V volts while another of resistance R2 is rated 2P watts, V/2 volts. Determine R1 / R2
K.C.S.E Physics Q & A - MODEL 2007PP2QN08
​In the circuit diagram shown in figure 7, the ammeter has negligible resistance
When the switch S, is closed, the ammeter reads 0.13 A.
​Determine the internal resistance of the cell
K.C.S.E Physics Q & A - MODEL 2007PP2QN07
​ Figure 6 shows a ray of light incident on the face of a water prism
​Sketch the path of the ray as it passes though the prism
Critical angle for water is 49 K.C.S.E Physics Q & A - MODEL 2007PP2QN06
​ Figure 5 (a) and (b), show wavefronts incident on barriers blocking part of the path.
​On the same figures sketch the wavefronts to show the behavior of the waves as they pass each barrier and after passing the barrier.
K.C.S.E Physics Q & A - MODEL 2007PP2QN05
​Figure 4. shows the displacement – time graph for a certain wave
Determine the frequency of the wave
K.C.S.E Physics Q & A - MODEL 2007PP2QN04
​Figure 3 shows an object, O in front of a concave mirror and its image, I formed after reflection.
​(a) On the same diagram draw appropriate ray (s) to locate the principal focus, F, of the mirror.
(b) Determine the focal length of the mirror (scale 1: 5) K.C.S.E Physics Q & A - MODEL 2007PP2QN03
​Figure 2 shows a horse – shoe magnet whose poles are labeled and two other magnets near it.
Iron are attracted to the lower ends of the n\magnets as shown.
Identify the poles marked X and Y
X ​Y
ANSWER
K.C.S.E Physics Q & A - MODEL 2007PP2QN02
State one advantage of an alkaline cell over a lead – acid cell
answer
K.C.S.E Physics Q & A - MODEL 2007PP2QN01
​Figure 1 represents a pinhole camera
​Sketch rays to show the formation of an enlarged image in the camera. Label both the object and the image
K.C.S.E Physics Q & A - MODEL 2007PP1QN14
​Figure 8 shows a uniform light bar resting horizontally on corks floating on water in two beakers A and B.
​Explain why the bar tilts towards side A when equal amount of heat is supplied to each beaker
answer
K.C.S.E Physics Q & A - MODEL 2007PP1QN12&13
​The graph in figure 7 shows the relationship between the pressure and temperature for an ideal gas. Use the information in the figure to answer questions 12 and 13
​State the unit of the horizontally axis
Write a statement of the gas law represented by the relationship
answer
12. Kelvin (K) in words ( one triangle used follow)
13. The pressure of a fixed mass of a gas is directly proportional to its absolute ( Kelvin temperature provided the volume is kept constant P & T volume constant
K.C.S.E Physics Q & A - MODEL 2007PP1QN11
State two factors that effect the melting point of ice
answer
K.C.S.E Physics Q & A - MODEL 2007PP1QN09&10
​ The graph in figure 6 shows the velocity of a car in the first 8 seconds as it accelerates from rest along a straight line. Use the graph to answer questions 9 and 10.
Determine the distance traveled 3.0 seconds after the start
Determine the acceleration of the car at 4.0 seconds K.C.S.E Physics Q & A - MODEL 2007PP1QN08
​Figure 5 shows a uniform bar of length 1.0 m pivoted near one end. The bar is kept in equilibrium by a spring balance as shown.
Given that the reading of the spring balance is 0.6 N. Determine the weight of the bar.
K.C.S.E Physics Q & A - MODEL 2007PP1QN06&7
​Figure 4 show two identical balloons A and B. The balloons were filled with equal amounts of the same type of gas. The balloons are suspended at distances X1 and X2 from a metal cube filled with boiling water and placed on an insulating material. Use this information to answer questions 6 and 7.
​State the mode by which heat travels from the cube to the balloons
The face of the cube towards A. is bright and shiny and the face towards B is dull black. State with reason the adjustments that should be made on the distances X1 and X2 so that the rate of change of temperature in both balloons is the same. |
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