K.C.S.E Physics Q & A - MODEL 2003PP1QN29
​Figure 16 (a) and (b) show a convex mirror and a plane mirror of equal aperture.
By sketching a pair of incident and reflected rays for each (a) and (b) show how the convex mirror provides to the eye, a wider field of view than the plane mirror.
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K.C.S.E Physics Q & A - MODEL 2003PP1QN28A heating element rated 2.5 kW is used to raise the temperature of 3.0kg of water through 500oC. Calculate the time required to effect this. (Specific heat capacity of water is 4200 J/kgK)K.C.S.E Physics Q & A - MODEL 2003PP1QN27
Figure 15 shows an experimental arrangement for determining the wavelength of light,
​State and explain the difference in the patterns observed on the screen other than the difference in colour when the source of red light is replaced by a source of violet light.
ANSWER
K.C.S.E Physics Q & A - MODEL 2003PP1QN26
​Two identical stones A and B are released from the same height above the ground fall through air while A falls through water.
On the axes provided in Figure 14, sketch the graphs of kinetic energy (KE) against time (t)
K.C.S.E Physics Q & A - MODEL 2003PP1QN25
Give a reason why the target in an X-ray tube is made of tungsten or molybdenum.
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN24
On the axes provided in Fig. 13, sketch a graph of pressure(p) against reciprocal of volume(1/V) for a fixed mass of an ideal gas at constant temperature.
K.C.S.E Physics Q & A - MODEL 2003PP1QN23
In the circuit diagram shown in fig. 12, the lamps are Identical and the cells are also identical.
​State with reason, in which circuit the lamp will be lit for longer period.
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN22
​On the axes provided in Figure 11, sketch a graph of velocity ( V0 versus time (t) for uniformly accelerated motion given that when t = 0, v s greater than zero
K.C.S.E Physics Q & A - MODEL 2003PP1QN21
A girl standing 600m away from a cliff bangs two pieces of wood together and hears and echo 3.5 seconds later. Determine the speed of sound in air at that place.​
K.C.S.E Physics Q & A - MODEL 2003PP1QN20
​When a piece of metal is placed on water, it sinks. But when the same piece of metal is placed on a block of wood, both are found to float. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN19
Pure silicon can be changed into p –type semiconductor by adding an impurity. Explain how this is achieved.
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN18
​ The following equation shows part of a radioactive decay process.
​Name the radiation x.
K.C.S.E Physics Q & A - MODEL 2003PP1QN17
​An electric bulb is rated 75W, 240V. Determine the resistance of the bulb
K.C.S.E Physics Q & A - MODEL 2003PP1QN16
Figure 10 (draw to scale) shows an image I formed by a diverging lens, L.
​On the same diagram, draw appropriate rays to locate the position of object. Determine the object distance.
K.C.S.E Physics Q & A - MODEL 2003PP1QN15
​One of the conditions for total internal reflection to occur is that angle of incidence must be greater than the critical angle of the medium. State the other condition
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN14
​Figure 9 shows a uniform bar in equilibrium under the action of two forces.
Determine the value of F
K.C.S.E Physics Q & A - MODEL 2003PP1QN13
Give a reason why the core of the electromagnet of an electric bell is made of soft iron and not steel.
answers
K.C.S.E Physics Q & A - MODEL 2003PP1QN12
​ Figure 8 shows a bar of soft iron placed near a magnet.
On the same diagram, sketch the magnetic field pattern due to the set up
K.C.S.E Physics Q & A - MODEL 2003PP1QN11
One of the factors that affect the surface tension of a liquid is the presence of impurities. State one other factor.
answer
State one advantage of a lead – acid accumulator over a nickel – iron (NiFe) accumulator.10/7/2020
K.C.S.E Physics Q & A - MODEL 2003PP1QN10
State one advantage of a lead – acid accumulator over a nickel – iron (NiFe) accumulator.
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN09
​ Figure 7 shows a highly negatively charged rod being brought slowly near the cap of a positively charged leaf electroscope. It is observed that the leaf initially falls and then rises.
​Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN08
​ Figure 6 shows a ray of light being reflected from a mirror.
What is the angle of reflection?
K.C.S.E Physics Q & A - MODEL 2003PP1QN07
​When a Bunsen burner is lit below wire gauze, it is noted that the flame initially burns below the gauze as shown in Figure 5 (i).After sometime, the flame burns below as well as above the gauze as shown in Figure 5(ii).
Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN06
​In the set up shown in Figure 4, it is observed that the level of the water initially drops before starting to rise.
​Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2003PP1QN05
Explain the cause of random motion of smoke particles as observed in Brownian motion experiment using a smoke cell.
answer
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