K.C.S.E Physics Q & A - MODEL 2010PP2QN10
A current I flowing through a wire of resistance R was increased seven times. Determine the factor by which the rate of heat production was increased.
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K.C.S.E Physics Q & A - MODEL 2010PP2QN09
​The initial mass of a radioactive substance is 20g. The substance has a half-life of 5 years.
Determine the mass remaining after 20 years. K.C.S.E Physics Q & A - MODEL 2010PP2QN08
​A water wave of wavelength 18 mm is incident on a boundary of shallow water at right angles. If the wavelength in the shallow end is 14.4 mm, determine the refractive index of water for a wave moving from the deep to the shallow end.
K.C.S.E Physics Q & A - MODEL 2010PP2QN07
​Figure 5, shows how the displacement of a point varies with time as a wave passes it.
​On the same diagram, draw a wave which passes the point with half the amplitude and twice the frequency of the one shown.
K.C.S.E Physics Q & A - MODEL 2010PP2QN06
Explain why electric power is transmitted over long distances at high voltages.
answer
K.C.S.E Physics Q & A - MODEL 2010PP2QN05
​Figure 4, shows a bright electric lamp placed behind a screen which has a hole covered with a wire gauze. A concave mirror of focal length 25cm is placed in front of the screen. The position of the mirror is adjusted until a sharp image of the gauze is formed on the screen.
​Determine the distance between the mirror and the screen.
answer
K.C.S.E Physics Q & A - MODEL 2010PP2QN04
​A positively charged sphere is suspended by an insulating thread. A negatively charged conductor is suspended near it. The conductor is first attracted, after touching the sphere it is repelled. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2010PP2QN03
​Figure 3, shows a diagram of a current-carrying wire wound on a U-shaped soft iron.
​Draw the magnetic field pattern around P and Q.
K.C.S.E Physics Q & A - MODEL 2010PP2QN02
​Figure 2(a), shows a magnetic compass placed under a horizontal wire XV
​A large current is passed from X to Y. Draw the final position of the magnetic compass needle in figure 2b.
K.C.S.E Physics Q & A - MODEL 2010PP2QN01
​Figure 1, shows a ray of light incident on a plane mirror at O. The mirror is then rotated anticlockwise about O from position M1 to position M2 through an angle of 10°. The final reflected ray is OC
​Determine the angle of deviation BOC
K.C.S.E Physics Q & A - MODEL 2010PP1QN19
​(a) Figure 9 shows a velocity-time graph for the motion of a certain bod
​Describe the motion of the body in the region:
(i) OA; (ii) AB; (iii) BC. (b) A car moving initially at 10 ms-1 decelerates at 2.5 m/s2. (I) Determine: (I) its velocity after 1 .5s; (II) the distance travelled in 1.5s; (III) the time taken for the car to stop. (ii) Sketch the velocity-time graph for the motion of the car up to the time the car stopped. (iii) From the graph, determine the distance the car travelled before stopping. K.C.S.E Physics Q & A - MODEL 2010PP1QN18Figure 8 shows a stone of mass 4.0kg immersed in water and suspended from a spring balance with a string. The beaker was placed on a compression balance whose reading was 85N. The density of the stone was 3000kgm-3 while the density of the liquid Was 800kgm-3.
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