K.C.S.E Physics Q & A - MODEL 2010PP1QN03
Some water in a tin can was boiled for some time. The tin can was then sealed and cooled. After some time it collapsed. Explain this observation.
answer
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K.C.S.E Physics Q & A - MODEL 2010PP1QN02
A stopwatch started O.50s after the start button was pressed. The time recorded using the stopwatch for a bail bearing falling through a liquid was 2.53s. Determine the time of fall.
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K.C.S.E Physics Q & A - MODEL 2010PP1QN01
​Figure 1 shows a vernier calipers being used to measure the internal diameter of a tube.
Record the diameter of the tube.
answers
K.C.S.E Physics Q & A - MODEL 2009PP2QN13
​Figure 6 (a) and figure 6 (b) show a p-n junction to a battery. It is observed that the current in figure 6 (a) is greater than the current in figure 6 (b)
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K.C.S.E Physics Q & A - MODEL 2009PP2QN12
​ A boy standing in front of a cliff blows a whistle and hears the echo after 0.5s. He then moves 17 metres further away from the cliff and blows the whistle again. He now hears the echo after 0.6s. Determine the speed of the sound.
K.C.S.E Physics Q & A - MODEL 2009PP2QN11
​ In an X- ray tube it is observed that the intensity of X- rays increases when potential differences across the filament is increased. Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2009PP2QN10
​Figure 5 shows a magnet being moved towards a stationary solenoid. It is observed that a current flows through the circuit in a direction Q to P.
​Explain:
(i) How the current is produced (ii) Why the current flows from Q to P
answer
(i) Movement of magnet causes flux linkage to change
E.M.F is produced in the cell. (ii) When 1 flow from Q to P, a N. pole is created which opposes the approaching pole (long’s law). K.C.S.E Physics Q & A - MODEL 2009PP2QN09
​In an experiment, a pin a converging lens and a plane mirror are arranged as shown in figure 4. The distance between the pin and the plane mirror is L cm while the distance between the lens and the plane mirror is q cm. The position of the pin is adjusted until its tip coincides with its real image
​State the focal length of the lens
answer
K.C.S.E Physics Q & A - MODEL 2009PP2QN08
​Figure 3 shows part of an electrical circuit. The current through the 18ohms resistor is observed to be 2A.
​State the value of the current through each of the 10 ohm resistors
answer
K.C.S.E Physics Q & A - MODEL 2009PP2QN07Determine the speed of light in water given that the speed of light in air is 3.0 x 108 ms-1 and the refractive index of water is 1.33K.C.S.E Physics Q & A - MODEL 2009PP2QN06
​Figure 2 shows how the displacement varies with time for a certain wave
​Determine the frequency of the wave
K.C.S.E Physics Q & A - MODEL 2009PP2QN05
An electromagnet is made by winding insulated copper wire on an iron core. State two changes that could be made to increase the strength of the electromagnet.
answer
Give a reason why it is necessary to leave the caps of the cells open charging an accumulator.17/7/2020
K.C.S.E Physics Q & A - MODEL 2009PP2QN04
Give a reason why it is necessary to leave the caps of the cells open charging an accumulator.
answer
K.C.S.E Physics Q & A - MODEL 2009PP2QN03
​A conductor is slowly bought near the cap of a positively charged electroscope. The leaf first collapses and then diverges. State the charge on the conductor.
answer
K.C.S.E Physics Q & A - MODEL 2009PP2QN02Figure 1 shows a ray of light incident on a mirror at an angle of 450. Another mirror is placed at an angle of 450 to the first one as shown
Sketch the path of the ray until it emerges
State the number of images formed when an object is between two plane mirror placed in parallel17/7/2020
K.C.S.E Physics Q & A - MODEL 2009PP2QN01
State the number of images formed when an object is between two plane mirror placed in parallel
answer
K.C.S.E Physics Q & A - MODEL 2009PP1QN19
​(a) Define angular velocity
(b) Three masses are placed on a rotating table at distances 6 cm, 9 cm and 12 cm respectively from the centre of rotation. When the frequency of rotation is varied, it is noted that each mass slides off at a different frequency of rotation of the table. Table 1 shows the frequency at which each mass slides off (i) State two factors that determine the frequency at which each mass slides off
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