K.C.S.E Physics Q & A - MODEL 2001PP2QN06
​a i) State one of the Newton's law of motion
ii) A body resting on a horizontal surface is given an initial velocity V so that it slides on the surface for some distance before coming to a stop. Table I shows the distances d moved by the body of various values of u
Given that v2 is 20 (miu)d where u is a constant for the surface, plot a appropriate graph and use it to determine u.
Determine values of u on table. b) A train of mass 200 tonnes starts from rest and accelerates uniformly at 0.5ms-2 determine its momentum after moving 100m.
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K.C.S.E Physics Q & A - MODEL 2001PP2QN02
​ a) Fig 1 (a) shows the circuit of a simple telephone receiver. When the telephone is lifted, a steady current flows through the solenoids. When a person speaks into the microphone on the other side, a varying current flows. These two currents are shown in fig. 1(b).
​i) State the reason why solenoids are wounds in opposite directions around the soft-iron core pieces as shown.
ii) Explain how the speech current from the microphone is converted into sound in the receiver. iii) State and explain the effect of replacing the soft iron core pieces with steel core pieces. ​b) A step down transformer has 400 turns in the primary coil and 20 turns in the secondary coil A 50 ohms resister is connected to the secondary output. If the r.m.s (root-mean-square) value of the primary voltage is 240; determine the peak value of the current in the in the secondary circuit. K.C.S.E Physics Q & A - MODEL 2001PP2QN01
A block of ice of mass 40g at 0C is placed in a calorimeter containing 400g of water at 20C .Ignoring the heat absorbed by the calorimeter, determine the final temperature of the mixture after all the ices has melted. (Specific latent heat capacity of fusion of ice= 340,00J/kg, specific heat capacity of water = 4,200j/kg).​
K.C.S.E Physics Q & A - MODEL 2001PP1QN32
A 60W bulb is used continuously for 36 hours. Determine the energy consumed. Give your answer in kilowatt hour (kWh).
K.C.S.E Physics Q & A - MODEL 2001PP1QN27
State the reason why radio waves signals are easier to receive than TV (television) signals in a place surrounded by hills.
answer
K.C.S.E Physics Q & A - MODEL 2001PP1QN21
Fig. 15 14 shows a ray of light incident on a glass prism.
​If the critical angle of the glass is 39 sketch on the same diagram the path of the ray until it emerges from the prism.
K.C.S.E Physics Q & A - MODEL 2001PP1QN19
​Fig 12 shows tow identical containers A and B into which a copper rod is fitted. The containers are well lagged.
​The liquids in the containers were initially at the same temperature if the heat is a applied continuously at the position shown, state with reason for the container through which the loss of heat is likely to be higher.
answer
K.C.S.E Physics Q & A - MODEL 2001PP1QN18
An electric heater rated 240V ; 300w is to be connected to a 240V mains supply, through a 10A fuse. Determine whether the fuse is suitable or not.K.C.S.E Physics Q & A - MODEL 2001PP1QN17
​The ammeter in the circuit in Fig. 11 has negligible resistance.
When the switch S is closed, the ammeter reads 0.01A. Determine the internal resistance of the battery. K.C.S.E Physics Q & A - MODEL 2001PP1QN16
​Fig 10. Shows water waves incident on a shallow region of the shape shown with dotted line.
​On the same diagram, sketch the wave pattern in and beyond the shallow region.
K.C.S.E Physics Q & A - MODEL 2001PP1QN15A certain machine raises 2.0 tonnes of water through 22 metres.It the efficiency of the machine is 80%, how much work is done on the machine.(Acceleration due to gravity g = 10ms-2)K.C.S.E Physics Q & A - MODEL 2001PP1QN14A bullet moving at a velocity of 300ms-1 hits a tree trunk of diameter 50cm. It emerges from the opposite side with a velocity of 150ms-1. Determine the average deceleration of the bullet in the trunk.K.C.S.E Physics Q & A - MODEL 2000PP2QN06
a) State the necessary conditions for interference to occur in waves
b) Fig 9. Drawn to scale of 1: 200 shows two speakers L1 and L2 connected to a signal generator (not shown) producing sound waves of frequency 350Hz. An observer walking along PQ hears loud and low sounds at alternative positions.
​(i) Explain how the observations made are caused
(ii) At point O a loud sound is heard and at point A, the next loud sound is heard. Use this information and the diagram to determine the velocity of sound in air. (iii) State and explain the effect of increasing the frequency of the signal generator on the distance OA. K.C.S.E Physics Q & A - MODEL 2000PP2QN03
a) Using the kinetic theory of gases, explain how a rise in the temperature of a gas causes a rise in the pressure of the gas if the volume is kept constant.
b) Fig. 5 shows a set up that may be used to verify Charles Law. i) State the measurements that should be taken in the experiment.
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