K.C.S.E Physics Q & A - MODEL 2009PP1QN06
​Two identical beakers A and B containing equal volumes of water are placed on a bench. The Water in A is cold while in B it is warm. Identical pieces of potassium permanganate are placed gently at the bottom of each beaker inside the water. It is observed that the spread of colour in B is faster than in A. Explain this observation.
answer
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K.C.S.E Physics Q & A - MODEL 2009PP1QN04&5
​ Figure 2 shows two cylinders containing a liquid and connected with a tight – fitting flexible tube. The cylinders are fitted with air- tight pistons A and B as shown
​When equal forces, F are applied on the pistons as shown it is observed that piston A moves up while B moves down. Explain this observations
answer
K.C.S.E Physics Q & A - MODEL 2009PP1QN03
A steel needle when placed carefully on water can be made to float. When a detergent is added to the water it sinks. Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2009PP1QN02
In an experiment to determine the acceleration due to gravity g, a student measured the period, T and length L, of a simple pendulum. For a length L = 70.5 cm, the period T obtained as 1.7s. Given that T = 2phie √ L/g, determine the value of g correct to two significant figures
K.C.S.E Physics Q & A - MODEL 2009PP1QN01
​In an experiment to measure the density of a liquid, a student filled a burette with a liquid to the 0 cm3 mark. Figure 1 shows a section of the burette showing the level of the liquid after 54.5 g of the liquid had been run ou
​Determine the density of the liquid
K.C.S.E Physics Q & A - MODEL 2008PP2QN14
​ A radioactive isotope of copper decays to form an isotope of Zinc as shown below
​Name the radiation emitted and give a reason for your answer
Radiation Reason
ANSWER
K.C.S.E Physics Q & A - MODEL 2008PP2QN13
The accelerating potential of a certain X-ray tube is increased. State the change observed on the X-rays produced.
ANSWER
K.C.S.E Physics Q & A - MODEL 2008PP2QN12
​ A narrow beam of electrons in a cathode ray oscilloscope (CRO) strike the screen producing a spot. State what is observed on the screen if a low frequency a.c source is connected across the y-input of the CRO
ANSWER
K.C.S.E Physics Q & A - MODEL 2008PP2QN11
Figure 7 shows how rays from a distant and a near object are focused inside a human eye with a certain defect.
​Name the defect and state the cause of this defect.
Defect Cause of defect
ANSWER
K.C.S.E Physics Q & A - MODEL 2008PP2QN10
A heating coil is rated 100W, 240V. At what rate would it dissipate energy if it is connected to a 220V supply?K.C.S.E Physics Q & A - MODEL 2008PP2QN09
​Figure 6 shows a circuit in which a battery of negligible internal resistance, two resistors, a capacitor, a voltmeter and a switch are connected.
Giving a reason for your answer in each case, state the reading of the voltammeter, V, when the switch is
(i) Open V=………………………… Reason………………… (ii) Closed V=………………………… Reason………………. K.C.S.E Physics Q & A - MODEL 2008PP2QN08
​Figure 5 shows wavefronts approaching the boundary between two media.
​The speed of the waves in medium (2) is higher than that in medium (1). On the same diagram complete the figure to show the wavefronts after crossing the boundary.
K.C.S.E Physics Q & A - MODEL 2008PP2QN07
Figure 4 shows a hack-saw blade clamped horizontally on a bench and the free end is made to vibrate about the rest position.
​Determine the frequency of vibration of the blade.
K.C.S.E Physics Q & A - MODEL 2008PP2QN06
​ Figure 3 shows a flat spring made of iron clamped horizontally on the bench over a solenoid
When the switch is closed, the spring vibrates. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2008PP2QN05
​The diagram in figure 2 shows an object O placed in front of a converging lens. F and F are the principal foci for the lens.
The object is now moved along the principal axis until a virtual image is produced.
On the same diagram: (i) Draw the object O in the new position along the principal axis; (ii) Sketch rays to show formation of the virtual image K.C.S.E Physics Q & A - MODEL 2008PP2QN04
​ An un-magnetized steel rod is clamped facing North-South direction and then hammered repeatedly for some time. When tested, it is found to be magnetized. Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2008PP2QN03
​ You are provided with the following;
A cell and holder, a switch, a rheostat, an ammeter, a voltmeter and connecting wires. Draw a diagram for a circuit that could be used to investigate the variation of the potential difference across the cell with the current drawn from the cell. K.C.S.E Physics Q & A - MODEL 2008PP2QN02
A leaf electroscope A is charged and placed on the bench. Another uncharged leaf electroscope B is placed on the same bench and moved close to A until the caps touch. State and explain what is observed on the leaves of A and B.
answer
K.C.S.E Physics Q & A - MODEL 2008PP2QN01
​Figure 1 shows three point sources of light with an opaque object placed between them and the screen.
​Explain the nature of the shadow formed along B and C.
answer
BC - Total absence of light; umbra, completely dark
- Total darkness Rays are completed blocked from this region by the object K.C.S.E Physics Q & A - MODEL 2008PP1QN14
​The system in Fig. 8 is in equilibrium
​When the temperature of the water is raised the system is observed to tilt to the right, state the reason for this observation.
answer
K.C.S.E Physics Q & A - MODEL 2008PP1QN13
​The graphs in Fig. 7 represent the relations between extension e and mass m added on two springs x and y.
Given that the two springs are made of same materials, give a reason why the graphs are different.
answer
K.C.S.E Physics Q & A - MODEL 2008PP1QN12
​Fig. 6 shows a sheet of paper rolled into a tube.
​When a fast stream of air is blown into the tube as shown in the diagram the paper tube collapses. Explain the observation.
answer
K.C.S.E Physics Q & A - MODEL 2008PP1QN10&11
Fig. 5 shows a toy resting on top of a closed bottle. Use the information on the figure to answer questions 10 and 11.​
Mark on the diagram, point Q, the approximate centre of gravity of the toy.
Giving a reason, name the state of equilibrium of the toy.
K.C.S.E Physics Q & A - MODEL 2008PP1QN09
Explaining the difference between a liquid and a gas in terms of intermolecular distances and forces.
answer
K.C.S.E Physics Q & A - MODEL 2008PP1QN08Fig. 4 shows a conical flask 15cm high, filled with a liquid of density 1200kgm-3. The atmospheric pressure of the surrounding is 8.4 x 104 Pa.
Determine the pressure at the point marked X, at the bottom of the flask.
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