K.C.S.E Physics Q & A - MODEL 2016PP2QN07
​Figure 5 shows the cross-section of a dry cell. Use the information on the figure to answer questions below
​(a) Name the parts labeled A and B.
(b) State the use of manganese (IV) oxide in the cell.
answers
​(a) A – Carbon rod or graphite rod
B – Mixture of Manganese (IV) oxide with carbon powder (b) Manganese (IV) oxide is a depolarizer or oxidizing agent. It is used to oxidize hydrogen to water
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K.C.S.E Physics Q & A - MODEL 2016PP2QN06
​Figure 4 shows straight waves incident on a diverging lens placed in a ripple tank to reduce its depth
​Complete the diagram to show the waves in both the shallow region and beyond the lens.
K.C.S.E Physics Q & A - MODEL 2016PP2QN05
​State the reason why a convex mirror is preferred over a plane mirror for use as a driving mirror.
answer
K.C.S.E Physics Q & A - MODEL 2016PP2QN04
​Figure 5, shows how the displacement of a point varies with time as a wave passes it.
​On the same diagram, draw a wave which passes the point with half the amplitude and twice the frequency of the one shown.
K.C.S.E Physics Q & A - MODEL 2016PP2QN03
​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 2016PP2QN02
.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 2016PP2QN01
​Figure 1 shows a ray of light incident on a mirror at an angle of 45°.Another mirror is placed at an angle of 45° to the first one as shown.
​Sketch the path of the ray until it emerges.
K.C.S.E Physics Q & A - MODEL 2016PP1QN13
​The graph in figure 10 shows the velocity of a car in the first 8 seconds as it accelerates from rest along a straight line.
​Determine the distance traveled 3.0 seconds after the start
State why it is easier to separate water into drops than to separate a solid into smaller pieces27/7/2020
K.C.S.E Physics Q & A - MODEL 2016PP1QN12
State why it is easier to separate water into drops than to separate a solid into smaller pieces
answer
K.C.S.E Physics Q & A - MODEL 2016PP1QN11
Figure 9 shows a uniform cardboard in the shape of parallelogra
​Locate the centre of gravity of the cardboard
K.C.S.E Physics Q & A - MODEL 2016PP1QN10Figure 8 shows two cylinders of different cross-sectional areas connected with a tube. The cylinders contain an incompressible fluid and are fitted with pistons of cross-sectional areas 4 cm2 and 24 cm2.Opposing forces P and Q are applied to the pistons such that the pistons do not move. If the pressure on the smaller piston is 5 N cm2, Determine force Q.K.C.S.E Physics Q & A - MODEL 2016PP1QN09
​The three springs shown in figure 5 are identical and have negligible weight. The extension produced on the system of springs is 20 cm.
​Determine the constant of each spring
K.C.S.E Physics Q & A - MODEL 2016PP1QN08
(a)An aeroplane is moving horizontally through still air at a uniform speed. It is observed that when the speed of the plane is increased, its height above the ground increases. State the reason for this observation.
​(b)Figure 6 shows parts A, B and C of a glass tube.
​State with a reason the part of the tube in which the pressure will be lowest when air is blown through the tube from A towards C.
answers
​(a) Increase in the speed of the plane decreases the pressure of air above it while the pressure below it remains high. This leads to a resultant upward force
(b) Point B The velocity is high at this point hence pressure decreases K.C.S.E Physics Q & A - MODEL 2016PP1QN07
​Figure 5 shows an aluminium tube tightly stuck in a steel tube.
Explain how the two tubes can be separated by applying a temperature change at the same junction given that aluminum expands more than steel for the same temperature rise.
answer
K.C.S.E Physics Q & A - MODEL 2016PP1QN06
Figure 2 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 2016PP1QN05
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 question 5(a) and 5(b).
​What property of metals could be tested using this set-up?
answer
K.C.S.E Physics Q & A - MODEL 2016PP1QN04
​Figure 2(a) and 2(b) shows capillary tubes inserted in water and mercury respectively.
​It is observed that in water the meniscus in the capillary tube is higher than the meniscus in the beaker, while in the mercury the meniscus in the capillary tube is lower than the meniscus in the beaker. Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2016PP1QN03
When a drop of oleic acid of known volume is dropped on the surface of water in a large trough, it spreads out to form a large circular patch.
State one assumption made when the size of the molecule of oleic acid is estimated by determining the area of the patch. ​
answer
K.C.S.E Physics Q & A - MODEL 2016PP1QN02
​Figure 1 shows the change in volume of water in a measuring cylinder when an irregular solid is immersed in it
Given that the mass of the solid is 567 g, determine the density of the solid in g/cm3 (Give your answer correct to 2 decimal places)
K.C.S.E Physics Q & A - MODEL 2016PP1QN01
State what mechanics as a branch of physics deals with.
ANSWER
K.C.S.E Physics Q & A - MODEL 2015PP2QN13
​When a transformer is connected to an ac source, the output voltage is found to be 24 V. If the power input is 200 W, determine the output current. (Assume the transformer is 100% efficient)
K.C.S.E Physics Q & A - MODEL 2015PP2QN12
​Figure 4 shows a cathode ray entering into a region between two charged plates.
​Complete the diagram to show the path of the ray in the field.
K.C.S.E Physics Q & A - MODEL 2015PP2QN11
State one application of thermionic emission.
answer
K.C.S.E Physics Q & A - MODEL 2015PP2QN10
A nail at the bottom of a beaker containing glycerine appears to be 6.8 cm below the surface of glycerine. Determine the height of the column of glycerine in the beaker. (take the refractive index of glycerine as 1.47)
K.C.S.E Physics Q & A - MODEL 2015PP2QN09
​A ship in an ocean sends out an ultra sound whose echo is received after 3 seconds. If the wavelength of the ultra sound in water is 7.5 cm, and the frequency of the transmitter is 20 kHz, determine the depth of the ocean.
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