K.C.S.E Physics Q & A - MODEL 1997PP2QN07
a) i. Distinguish between transverse and longitudinal waves
ii. Give one example of a transverse and one example of longitudinal. b) Figure 6 shows the displacement of a particle in a progressive wave incident on a boundary between deep and shallow regions. 
i. Complete the diagram to show what is observed after boundary. (assume no loss of energy)
ii. Explain the observation in (i) above. (c) Water waves are observed as they pass a fixed point at a rate of 30 crests per minute. A particular wave crest takes 2s to travel between two fixed points 6m apart. Determine for the wave: (a) The frequency (b) Wavelength (d) Figure 7 shows two loud speakers L1 and L2 connected to a signal generato 
One observer walks along line 00'' and another line AA'' for some distance. Describe the observations made by each observer and give reasons for your answer
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K.C.S.E Physics Q & A - MODEL 1997PP2QN06
(a) (i) Distinguish between semiconductor and conductors
(ii) Give one example of a semiconductor and one for a conductor (b) An npn transistor is operating in the common emitter mode (i) Draw the circuit diagram and indicate the direction of the currents (ii) Given that the emitter current is 2.0 m A and that 0.5% of the electrons diffusing into the base combine there with holes, determine the values of the base current and the collector current (ii) By increasing the p.d across the emitter – base junction in (ii), the emitter current increase to 4mA. Determine the transistor current amplificatio 
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K.C.S.E Physics Q & A - MODEL 1997PP2QN05
(b) In the set up in figure 5, the suspended metre rule is in equilibrium balanced by the magnet and the weight shown. The iron core is fixed to the bench
(i) State and explain the effect on metre rule when the switch S is closed
(ii) What would be the effect of reversing the battery terminals (iii) Suggest how the set up in figure 5 can be adapted to measure the current flowing in the current circuit. (c) Electrons emitted from a metal when light of a certain frequency is shone on the metal are found to have a maximum energy of 8.0 x 10-19J. If the work function of the metal is 3.2 x 10-19J, determine the wavelength of the light used
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K.C.S.E Physics Q & A - MODEL 1997PP2QN05
State two factors that affect the strength of an electromagnet.
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K.C.S.E Physics Q & A - MODEL 1997PP2QN04
Figure 4 shows a force- distance graph for a car being towed on a horizontal groun
(a) Calculate the total work done
(b) If the velocity just before reaching point D is 0.6ms-1, calculate the power developed by the agent providing the force at this point. (c) An electric pump can raise water from a low level reservoir to the higher – level reservoir at the rate of 3.0 x 105 kg per hour. The vertical height of the water raised 360m. If the rate of energy loss in form of heat is 200KW, determine the efficiency of the pump
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K.C.S.E Physics Q & A - MODEL 1997PP2QN03
(a) A stone is thrown vertically upwards from the edges of a platform. Eventually the stone lands without bouncing on the ground below the platform. Taking the upward velocity to be positive sketch on the axis provided the velocity time graph of the motion of the stone.
​(b) A car can be brought to rest from a speed of 20 ms-1 in a time of 2s
(i) Calculate the average deceleration (ii) If the driver's reaction time is 0.2s, determine the shortest stopping distance
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K.C.S.E Physics Q & A - MODEL 1997PP2QN02
(a) Figure 2 shows a uniform plank 20 m long, weighing 400N resting on two supports A and B 9cm apart. A person weighing 600N walks towards B starting at
The data in the table below represents the upward force FA exerted at A as a function of distance, d. The distance d is measured from A
(i) On the grid provided plot a graph of FA ( y – axis) against the distance d
(ii) From the graph determine how far beyond point B, the person can walk before the plank tips (b) In the set up in the figure 3, the metre rule is in equilibrium 
Given that the metre rule is uniform, determine its weigh
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K.C.S.E Physics Q & A - MODEL 1997PP2QN01
Figure 1 shows a circuit diagram for controlling the temperature of a room.
​(i) State and explain the purpose of the Bimetallic strip
(ii) Describe how the circuit controls the temperature when the switch is closed (b) A drinking glass 0.02 kg contains 200gms of water at 20°C. A mass of 0.04 kg of ice at 00 C is dropped into the glass. Determine the final temperature of the mixture. Specific heat capacity of glass = 670kg1K1. (Give your answer to correct ne decimal place)
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K.C.S.E Physics Q & A - MODEL 1997PP1QN34
A lithium atom has 3 protons in its nucleus. Complete the diagram in figure 14 by marking X in the appropriate shells show the electron distribution when the atom is not excited
In a sample there are 5.12 x 1020 atoms of krypton – 92 initially. If the half of krypton; 92 is 3.0s determine the number of atoms that will have decayed after 6s.
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K.C.S.E Physics Q & A - MODEL 1997PP1QN33
State how eddy currents are reduced in a transformer
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K.C.S.E Physics Q & A - MODEL 1997PP1QN32
Using the components symbols shown in figure 14, sketch a series circuit diagram for a forward biased diode
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K.C.S.E Physics Q & A - MODEL 1997PP1QN31
Two turning forks are sounded together. What is the condition for the beats to be heard?
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K.C.S.E Physics Q & A - MODEL 1997PP1QN30
Figure 12 shows an experiment arrangement. S1 S2 and S are narrow slit
State what is observed on the screen when the source is?
(a) Monochromatic (b) White light
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(a) Dark and bright fringes
(b) Coloured fringes
K.C.S.E Physics Q & A - MODEL 1997PP1QN29
What is the value of -20°C on the absolute temperature scale?
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K.C.S.E Physics Q & A - MODEL 1997PP1QN28
Figure 11 shows part of a circuit containing three capacitors
Write an expression for CT the effective capacitance between A and B
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K.C.S.E Physics Q & A - MODEL 1997PP1QN27
A trolley is moving at constant speed in a friction compensated track. Some plasticine is dropped on the trolley and sticks on it. State with a reason what is observed about the motion of the trolley.
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K.C.S.E Physics Q & A - MODEL 1997PP1QN26
Figure 10 shows the apparent position of a fly in air as seen by a fish in wate
Sketch on the same diagram rays to show the actual position of the fly
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K.C.S.E Physics Q & A - MODEL 1997PP1QN25
Figure 9 shows two parallel rays incident on a concave mirror. F is the focal point of the mirror
Sketch on the same diagram the path of the rays after striking the mirror
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K.C.S.E Physics Q & A - MODEL 1997PP1QN24
Ice changes to water at 0°C. Equal masses of the ice and water at 0°C are each heated to 1°C. Give a reason why more heat energy is required to heat ice
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K.C.S.E Physics Q & A - MODEL 1997PP1QN21,22 &23
Using the information in figure 8 answer questions 21,22 and 23.
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Calculate the wavelength of the KBC FM radio wave transmitted at a frequency of 95.6 Mega Hertz.6/7/2020
K.C.S.E Physics Q & A - MODEL 1997PP1QN20
Calculate the wavelength of the KBC FM radio wave transmitted at a frequency of 95.6 Mega Hertz.
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K.C.S.E Physics Q & A - MODEL 1997PP1QN19
An object dropped from a height h attains a velocity of 6 ms-1 just before hitting the ground. Find the value of h.
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K.C.S.E Physics Q & A - MODEL 1997PP1QN18
A transformer in a welding machine supplies 6 volts from a 240V main supply. If the current used in the welding is 30A. Determine the current in at the mains.
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K.C.S.E Physics Q & A - MODEL 1997PP1QN17
Water flows in a horizontal smooth pipe. State the changes that would be observed in the nature of the flow if the speed of the water is steadily increased from low to a high value
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K.C.S.E Physics Q & A - MODEL 1997PP1QN16
An observer watching a fireworks displays sees the light from an explosion and hears the sound 2 seconds later. How far was the explosion from the observer?
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M.A NyamotiMy passion is to see students pass using right methods and locally available resources. My emphasis is STEM courses
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