K.C.S.E Physics Q & A - MODEL 2000PP1QN15&16
​Fig 10 shows a pulley system being used to raise a load. Use the information given in the figure to answer the questions 15 and 16.
​Determine the velocity ratio (VR) of the system.
If a load on 100N is raised by applying an effort of 28N, determine the efficiency of the system
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K.C.S.E Physics Q & A - MODEL 2000PP1QN14
​In fig 9 the couple represented by forces F1 is acting on light uniform bar.
Sketch on the figure a couple represented by forces F2 such that the bar is in equilibrium. And the forces F2 have minimum magnitude.
K.C.S.E Physics Q & A - MODEL 2000PP1QN13
​In fig 8 the arrow indicates the directions of the current in the conductor
Sketch on the diagram the magnetic field pattern due to the current.
K.C.S.E Physics Q & A - MODEL 2000PP1QN12
​ Fig. 7 shows how magnets are stored in pairs with keepers at the ends
​Explain how this method of storing helps in retaining magnetism longer.
ANSWER
K.C.S.E Physics Q & A - MODEL 2000PP1QN11
​The structure in fig. 6 is in equilibrium. Identify the struts and the ties in the structure.
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K.C.S.E Physics Q & A - MODEL 2000PP1QN10
State one advantage of an alkaline accumulator over a lead – acid accumulator.
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K.C.S.E Physics Q & A - MODEL 2000PP1QN09
​ Fig. 5 shows an object O placed infront of a plane mirror.
​On the same diagram draw rays to locate the position of the image I, as seen from the eye E.
K.C.S.E Physics Q & A - MODEL 2000PP1QN08
A wooden bench and a metal bench are both left in the sun for along time. Explain why the metal bench feels hotter to touch.
ANSWER
K.C.S.E Physics Q & A - MODEL 2000PP1QN07
​Fig. 4 shows a bimetallic thermometer.
​Explain how a rise in temperature causes the pointer to move in the direction shown.
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K.C.S.E Physics Q & A - MODEL 2000PP1QN06
State the reason why gases are easily compressible while liquids are solids are not?
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K.C.S.E Physics Q & A - MODEL 2000PP1QN05
​Fig. 3 shows a device for closing a steam outlet.
The area of the position is 4.0 x 10-4 m2 and the pressure of the steam in the boiler is 2.0 x 105 Nm3. Determine the weight W that will just hold the bar in the horizontal position shown.K.C.S.E Physics Q & A - MODEL 2000PP1QN04
​A positively charged rod is brought near the cap of a leaf electroscope. The cap is the earthed momentarily by touching with the finger. Finally the rod is withdrawn. The electroscope is found to be negatively charged. Explain how this charge is acquired.
ANSWER
K.C.S.E Physics Q & A - MODEL 2000PP1QN03
Fig. 2 shows a beaker placed on a bench. of ice is placed in the beaker as shown.
State and explain the change in the stability of the beaker when the ice melts.
ANSWER
K.C.S.E Physics Q & A - MODEL 2000PP1QN02
A bag of sugar is found to have the same weight on planet earth as an identical bag of dry sawdust on planet Jupiter. Explain why the masses of the two bags must be different.
ANSWERS
K.C.S.E Physics Q & A - MODEL 2000PP1QN01
Fig 1 shows part of a measuring cylinder calibrated in cm3 containing water whose level is indicated. Some 3.0cm of is added into the cylinder. Indicate on the diagram the new level of water.
K.C.S.E Physics Q & A - MODEL 1999PP2QN07
a) Figure 7 shows a photoelectric cell cirucuit:
​The intensity of the light can be varied.
i) Describe how the circuit may be used to show how the current I varies with the potential difference V across the cell. ii) Sketch on the same axis graphs of I versus V for three different values of light intensity E1E2 and E3 such that E3>E2>E1 b) Using a circuit similar to the one in figure 7. with the polarity of the batteries reversed, the frequency, of the light was varied at constant intensity. For each frequency, the potential difference was varied until the current was equal to zero. The value of this voltage, Vco was noted. The graph in figure 8 shows the relation between Vco and the frequency , of the incident light.Feom the graph, determine the: i) Value of planks constant, h (charge an electron e = 1.6 x 10-19Colubomb) ii) Work function, of the cathode surface of the cell . (Give your answers to 2 decimal places.)
answers
K.C.S.E Physics Q & A - MODEL 1999PP2QN06
​a) Explain the following observations: ice cube float on water and solid benzene sinks in liquid benzene.
bi) You are provided with the following: An overflow can - A beaker -A spring balance A metal block -Water and - String Describe an experiment to verify Archimedes principle. ii) A block of wood weighing 2.0N is held under water by a string attached to the bottom of a container. The tension in the string is 0.5N. Determine the density of the wood. ci) Define half – life of a radioactive material. ii) Figure 6 shows a graph of the variation of the number of atoms of a certain radioactive material with time. Figure6: Determine the half – life of the material K.C.S.E Physics Q & A - MODEL 1999PP2QN05a) A circuit consists of a battery, a metal wire, an ammeter and a switch connected in series. The switch is closed and the ammeter reading noted. The metal wire is now heated. State the observations made on the ammeter reading and give a reason for your answer.
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