K.C.S.E Physics Q & A - MODEL 1998PP1QN23
Cleavage in crystals is possible in certain directions only. Explain this observation.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN22
A body of mass M is allowed to slide down an inclined plane. State two factors that affect its final velocity at the bottom of the incline.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN21
In the circuit in fig 5 when the switch S is closed, the voltmeter shows a reading.
When the cell terminals are reversed and the switch is closed, the voltmeter reading is zero. Explain these observations.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN20
Table 1 carries information on the type of radiation, detector and use for some of the electromagnetic radiations. Fill in the blanks.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN19
State two differences between the cathode ray tube (CRT) of a TV and the cathode ray oscilloscope (CRO)
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K.C.S.E Physics Q & A - MODEL 1998PP1QN18
State the reason why the amplitude of a simple pendulum decreases with time.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN17
Calculate the length of a wire required to make a resistor of 0.5 ohms, if the receptivity of the material is 4.9 x 10-7 ohmmeter and the cross sectional area is 2.0 x 10-6cm-2
K.C.S.E Physics Q & A - MODEL 1998PP1QN16
In figure 4 one end of a metal rod is placed in steam and the other end in melting ice. The length of the rod in between in lagged.
State two factors that determine the rate at which ice melts.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN15
A highly negatively charged rod is gradually brought close to the cap of a positively charged electroscope. It is observed that the leaf collapses initially and then diverges. Explain the observation.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN14
Explain how hammering demagnetizes a magnet
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K.C.S.E Physics Q & A - MODEL 1998PP1QN13
State the reason why a voltmeter of high resistance is more accurate in measuring potential differences, that one of low resistance.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN12
The activity of a radioactive substance, initially at 400 counts per second reduces to 50 counts per second in 72 minutes. Determine the half – life of the substance.
K.C.S.E Physics Q & A - MODEL 1998PP1QN11
The internal resistance of the cell. E in figure 3 is 0.5 ohms.
Determine the ammeter reading when the switch S is closed.
K.C.S.E Physics Q & A - MODEL 1998PP1QN10
A car battery requires topping lip with distilled water occasionally. Explain why this is necessary and why distilled water is used.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN09
Water of mass 3kg at a temperature of 90°C is allowed to cool for 10 minutes.
State tow factors other than humidity. that determine the final temperature.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN08
The primary coils of a transformer has 2000 turns and carries a current of 3A. If the secondary coil is designed to carry a current of 30A, calculate the maximum number of turns in the secondary coil.
K.C.S.E Physics Q & A - MODEL 1998PP1QN07
State one advantage of fitting wide tyres on a vehicle that moves on earth roads.
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K.C.S.E Physics Q & A - MODEL 1998PP1QN06
Figure 2 draw to scale shows a lens L1 placed 30cm fro an object O. The image is formed on the screen S 50cm from the lens.
K.C.S.E Physics Q & A - MODEL 1998PP1QN05
A metal pin was observed to float on the surface of pure water. However the pin sank when a few drops of soap solution were carefully added to the water. Explain his observation.
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​K.C.S.E Physics Q & A - MODEL 1998PP1QN04
State one industrial use of X – rays
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​K.C.S.E Physics Q & A - MODEL 1998PP1QN03
A heating coil rated 1000 W takes 15 minutes to heat 20kg of a liquid from 26°C of 42°C. Determine the specific heat capacity of the liquid.K.C.S.E Physics Q & A - MODEL 1998PP1QN01
Figure 1 shows a fencing post whose length is being measured using a strip of a measuring tape.
Use this information to answer questions 1 and 2.
State the accuracy of the tape: What is the length of the post 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
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 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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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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