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.
ANSWERS
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K.C.S.E Physics Q & A - MODEL 1998PP1QN14
Explain how hammering demagnetizes a magnet
ANSWERS
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.
ANSWERS
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.
ANSWERS
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.
ANSWER
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.
ANSWERS
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.
ANSWER
​K.C.S.E Physics Q & A - MODEL 1998PP1QN04
State one industrial use of X – rays
ANSWER
​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 |
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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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