The figure below shows the path of a ray of light passing through a rectangular glass block placed in air
Calculate the refractive index of glass (2mks)
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 Two capacitors of capacitance 2 μF 1μF are connected in parallel. A p.d of 3V is applied across them. Find the energy stored in the combination. (2mks)
The figure below shows an object placed in front of a concave mirror. By use of correct ray diagram, locate the position of image
Solution
The figure bellows shows a wave profile for a wave whose frequency is 2HZDetermine the value of t3(s) (2mks)
Solution
The figure below shows two parallel magnets with unlike poles adjacent to each other. Sketch the magnetic field pattern around the magnets (2mks)
Solution
Give two advantages of a circuit breaker instead of a fuse in domestic wiring (2mks)
State the conditions for generation of e.m.f from a magnet (2mks)
The following is a part of a radio-active series
Identify the radiation r, find the values of c and d (3mks)r
r is βeta particle
c
c is 206
d
d is 82
State two uses of optical fibres whose working relies on total internal reflection (2mks)
Give a reason why gases are poor transmitters of sound (1mk)
Molecules in gases are much further apart
Other than penetrating powers, state two differences between soft and hard X-rays (2mks)
Two mirrors are inclined at 60o to each as shown:
Complete the ray diagram to show how it travels after striking the two mirrors and find the angle of reflection on each surface (2mks)Solution
A student holds a sheet of paper at an end so that it hangs in the position A as shown below17/10/2021  A student holds a sheet of paper at an end so that it hangs in the position A as shown above Explain why the paper rises to the position B when the student blows air in the direction shown by the arrow (2mks)There is pressure difference created as a result of air blown above the paper i.e. high velocity , low pressure
K.C.S.E Physics Q & A - MODEL 2019PP1QN13
Two boxes E and F of masses 2.0 kg and 4.0 kg respectively arc dragged along a frictionless surface using identical forces. State with a reason which box moves with a higher velocity.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN12
Figure 5 shows two springs C and D of the same length and equal number of turns made from the same wire.
State with a reason which of the two springs can support a heavier load before attaining the elastic limit.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN11
A stone of volume 800 cm3 experiences an upthrust of 6.5N when fully immersed in a certain liquid. Determine the density of the liquid.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN10
For a fluid flowing at a velocity V in a tube of cross-sectional area A, VA =constant. State two assumptions made in deriving this equation.
answer
The assumptions are: the fluid is
K.C.S.E Physics Q & A - MODEL 2019PP1QN09
State the meaning of the term “radian” as a Unit of measurement.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN08
Figure 4 shows a one meter long uniform rod of negligible weight supporting two weights.
Determine the position of the fulcrum from 0 cm for the rod to remain in equilibrium.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN07
A student carrying a heavy box using the right hand is observed to lean towards the left hand side. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN06
On the axes provided, sketch a displacement — time graph for a trolley moving down a frictionless inclined plane till it reaches the end of the incline.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN05
Figure 3 shows two metal rods A and B of equal length made of the same material but different diameters wax is attached at one end of each rod. A source of heat is placed between the two metal rods.
State with a reason, what is observed on the wax.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN04
Figure 2 shows a round bottomed flask containing a coloured liquid. The flask is fitted with a capillary tube.
It is observed that on holding the flask with bare hands, the level of the liquid in the capillary tube initially drops slightly and then rises. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN03
State two ways of reducing the surface tension of a liquid.
answer
K.C.S.E Physics Q & A - MODEL 2019PP1QN02
Figure 1 shows a defective straw used to suck milk from a glass.
It was observed that upon sucking the straw, milk did not rise up the straw. Explain this observation.
answer
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