K.C.S.E Physics Q & A - MODEL 2007PP1QN04&5
Figure 3 shows the levels of two liquids A and B after some air has been sucked out of the tubes through the tap. Use this information and the figure to answer questions 4 and 5.
​State the reason for the rise in the levels of the liquids when air is sucked from the tubes
Given that the density of liquid B is 1200 kgm3, determine the density of liquid A.
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K.C.S.E Physics Q & A - MODEL 2007PP1QN03
Figure 2 shows a tube of varying cross sectional area​
​Arrange the speed V1V2V3 and V4 in decreasing order starting with the highest
answer
​V2 V4 V1 V3
K.C.S.E Physics Q & A - MODEL 2007PP1QN01&02
​Figure 1 shows a metal cube of mass 1.75g placed between the jaws of a micrometer screw gauge. The magnified portion of the scale is also shown. The reading on the gauge when the jaws were fully closed without the cube was 0.012 cm. Use this information and the figure to answer questions 1 and 2
​What is the length of the cube?
Determine the density of the metal cube giving your answer correct to three significant figures K.C.S.E Physics Q & A - MODEL 2006PP2QN16
​ In the axes provided sketch the current – voltage characteristics for reverse – biased p- n junction
K.C.S.E Physics Q & A - MODEL 2006PP2QN15
​A nuclear reaction is represented by the following equation
​Determine the values of a and b
K.C.S.E Physics Q & A - MODEL 2006PP2QN14
State with a reason the effect on the X- rays produced in a n X- ray tube, when the p.d across the tube is increased
ANSWER
K.C.S.E Physics Q & A - MODEL 2006PP2QN12&13
​Figure 6 shows a tube for investing the properties of a beam of electrons. Use the information in the figure to answer questions 12 and 13
12. What property of the beam of electrons show that the electrons are traveling at a very high speed?
13. The beam of electrons is subjected to a strong magnetic field which is perpendicular to the path and into the paper. Sketch on the same figure, the new path of electrons. K.C.S.E Physics Q & A - MODEL 2006PP2QN10&11
​What is meant by the term work function?
If the frequency of the illuminating radiation is just equal to the threshold frequency of the surface explain why no photoelectric effect is observed
ANSWERS
K.C.S.E Physics Q & A - MODEL 2006PP2QN09
State one condition under which Ohm's law is obeyed in a metal conductor
ANSWER
K.C.S.E Physics Q & A - MODEL 2006PP2QN08S soldier standing some distance from a wall, blows a whistle and hears its echo 1 seconds later. How far is the wall from the soldier? ( speed of sound in air is 330ms-1)K.C.S.E Physics Q & A - MODEL 2006PP2QN07
​Figure 5 shows wave fronts approaching a concave surface
Complete the diagram to show the wave fronts formed after striking the surface. Show how the focal point of the surface is located
K.C.S.E Physics Q & A - MODEL 2006PP2QN06
​Figure 4 shows a solenoid carrying an electric current.
​Sketch the magnetic field pattern inside and at the ends of the solenoid
K.C.S.E Physics Q & A - MODEL 2006PP2QN05
​A long coil is attached to a vibrating blade as shown in figure 3
​State the type of mechanical wave generated by the set - up and mark alongside the coil, the length corresponding to the wavelength of the wave.
K.C.S.E Physics Q & A - MODEL 2006PP2QN04
State a reason why the caps of the cells of a lead- acid battery are opened when charging the battery.
ANSWER
K.C.S.E Physics Q & A - MODEL 2006PP2QN03
​ A metallic body shaped as shown in figure 2 is positively charged and insulted from the ground as shown in the figure.
​On the figure show the charge distribution
K.C.S.E Physics Q & A - MODEL 2006PP2QN02
​In a certain pinhole camera, the screen is 10cm from the pinhole. When the camera is placed 6m away from a tree, a sharp image of the tree 16cm high is formed on the screen. Determine the height of the tree.
K.C.S.E Physics Q & A - MODEL 2006PP2QN01
Figure 1 shows two bar magnets placed with the south poles close together
In figure 1 sketch the magnetic field pattern between the two south poles
K.C.S.E Physics Q & A - MODEL 2006PP1QN13
​ A footballer kicks a ball of mass 0.6 kg initially at rest using a force of 720N. If the foot was in contact with the ball for 0.1 seconds, what was the take off speed of the ball?
K.C.S.E Physics Q & A - MODEL 2006PP1QN12
​The uniform bar in figure 7 is provided at its midpoint. It is in equilibrium under the action of two identical balloons filled with equal volumes of different light gases at the same temperature.
Explain why the bar may not remain in equilibrium if the temperature of the surrounding changes.
ANSWER
K.C.S.E Physics Q & A - MODEL 2006PP1QN11A pipe of radius 6 mm is connected to another pipe of radius 9 mm. If water flows in the wider pipe at the speed of 2 ms-1, what is the speed in the narrower pipe?K.C.S.E Physics Q & A - MODEL 2006PP1QN10
​ Figure 6 shows the path taken by a matatu traveling on a horizontal ground ( a winding road)
The speed of the matatu is constant. Identify with reason the point along the path which a load placed loosely on the rack (carrier) of the matatu is most likely to roll off.
K.C.S.E Physics Q & A - MODEL 2006PP1QN09
On the axes provided sketch the graph of pressure P against volume V for a fixed mass of an ideal gas.
K.C.S.E Physics Q & A - MODEL 2006PP1QN08Beaker A contains 200g of water at 00 C while beaker B contains 200g of a mixture of ice and water at 00C. Two identical metal blocks are removed from a hot furnace. One block is dropped into beaker A while the other is dropped into beaker B at the same time.
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