K.C.S.E Physics Q & A - MODEL 2012PP2QN10
Figure 9, shows the cross-section of an optical fibre made of two types of glass A and B. The refractive index of B is lower than that of A.
A ray of light enters the optical fibre at P and emerges from Q.
(i) Sketch the path of the ray through the fibre. (ii) State the reason why light travels through the fibre as in (i) above.
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K.C.S.E Physics Q & A - MODEL 2012PP2QN09
Figure 8, shows an object O placed infront of a diverging lens whose principal focus is F
On the figure, draw a ray diagram to locate the image formed.
K.C.S.E Physics Q & A - MODEL 2012PP2QN08
Light from a lamp falls on the cap of a negatively charged electroscope. It is observed that the divergence of the leaf decreases. Explain the observation.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP2QN07
Figure 7, shows two similar coils P and Q around the end L and M of a piece of soft iron. A steady current passes through the coils
State the polarity of the resulting magnet at end L.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP2QN06
Figure 6, shows a narrow beam of radiation from a radioactive source, incident to a post card. The emergent radiation passes through a magnetic field which is perpendicular to the plane of the paper, and into the paper.
A detector moved along line AC only detects radiations B and C. State the types of radiation detected.
K.C.S.E Physics Q & A - MODEL 2012PP2QN05
Figure 5, shows an object O at the bottom of a beaker full of a liquid. An observer above the beaker sees its image at point X inside the liquid.
Determine the refractive index of the liquid.
K.C.S.E Physics Q & A - MODEL 2012PP2QN04
Figure 4, shows a negative point charge placed near a positively charged rod.
Draw on the diagram, the resulting electric field pattern.
K.C.S.E Physics Q & A - MODEL 2012PP2QN03
Figure 3, shows four identical light bulbs connected to a 15 volts battery whose internal resistance is negligible.
Determine the reading of the voltmeter V.
K.C.S.E Physics Q & A - MODEL 2012PP2QN02K.C.S.E Physics Q & A - MODEL 2012PP2QN01
Figure 1, shows a plane mirror XY placed equidistant from two parallel lines AB and PT.
Four students stand at P, Q, R and T in front of the mirror
(a) Indicate the positions of the images of students at Q, R and T on line AB. (b) State which of the images are visible to the student standing at P. (c) Using rays indicate on the figure, how (b) above is possible. K.C.S.E Physics Q & A - MODEL 2012PP1QN14
(a) An aeroplane is moving horizontally through still air at a uniform speed. It is observed that when the speed of the plane is increased, its height above the ground increases.
State the reason for this observation. (b) Figure 5 shows parts A, B and C of a glass tube.
State with a reason the part of the tube in which the pressure will be lowest when air is blown through the tube from A towards C.
answers
K.C.S.E Physics Q & A - MODEL 2012PP1QN13Figure 4 shows a graph of temperature against time when pure melting ice at 00 C is heated uniformly.
Explain what happens between parts:
(i) OA (ii) AB
answers
K.C.S.E Physics Q & A - MODEL 2012PP1QN12
State two reasons why the efficiency of a pulley system is always less than 100%.
answer
K.C.S.E Physics Q & A - MODEL 2012PP1QN11
Figure 3 shows a graph of velocity against time for a moving body.
Describe the motion of the body during the 10 seconds.
answer
K.C.S.E Physics Q & A - MODEL 2012PP1QN10
Table 1 shows the results of an experiment carried out to study the properties of a spring.
State with a reason whether the experiment was done within the elastic limit of the spring.
K.C.S.E Physics Q & A - MODEL 2012PP1QN09
State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP1QN08
In verifying the pressure law of gases, the temperature and pressure of a gas are varied at constant volume. State the condition necessary for the law to hold.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP1QN07
A balloon is filled with a gas which is lighter than air. It is observed to rise in air upto a certain height. State a reason why the balloon stops rising.
ANSWER
State two environmental hazards that may occur when oil spills over a large surface area of the sea.20/7/2020
K.C.S.E Physics Q & A - MODEL 2012PP1QN06
State two environmental hazards that may occur when oil spills over a large surface area of the sea.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP1QN05
Figure 2 shows a flat bottomed flask containing some water. It is heated directly with a very hot flame.
Explain why the flask is likely to crack.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP1QN04
A bottle containing a smelling gas is opened at the front bench of a classroom.
State the reason why the gas is detected throughout the room.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP1QN03
A solid weighs 16.5 N on the surface of the moon. The force of gravity on the moon is 1.7 Nk/g. Determine the mass of the solid.
K.C.S.E Physics Q & A - MODEL 2012PP1QN02
A student pulls a block of wood along a horizontal surface by applying a constant force. State the reason why the block moves at a constant velocity.
ANSWER
K.C.S.E Physics Q & A - MODEL 2012PP1QN01
Figure 1 shows a measuring cylinder containing some water.
Determine the reading on the measuring cylinder, after three drops of water each of volume 0.6 cm3 are added.
K.C.S.E Physics Q & A - MODEL 2011PP2QN14
State the meaning of the term “threshold frequency” as used in photoelectric emission.
answer
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