PHYSICS TEST
Time; 1.30
hours
Answer all
questions
1.
A. differentiate between
i.
Color and dispersion of colour
ii.
Primary colour and secondary colour.
Give example for each.
iii.
Additive colour mixing and
substractive colour mixing.
B. complete the
following
i. Red + green =
ii. Blue + green =
iii. Blue + red =
iv.
Cyan + red =
v.
Cyan + magenta =
2.
A. i. Mention types of lens
ii. Define (a)
Optical centre
(b) Focal length
B. An object
2cm high, is placed 24cm from the converging lens. An erect image which is 6cm
high is formed. Determine the image distance.
3. A. define optical instrument, give five
examples
B. compare and
contrast between human eye and lens camera
C. A compound
microscope consists of two lenses of a focal length 12cm and 6cm for the
objective lens and the eye piece lens respectively. the two lenses are
separated by a distance of 30cm. the microscope focused so that the image is
formed at infinity. Determine position of the object.
4. A. Define
thermal energy.
B. State any
five source of thermal energy in everyday life.
C.
Differentiate between heat and temperature
5. A. state the
Archimedes Principle.
B. A piece of
sealing was weighs 0.27N in air and 0.12N when immersed in water. Calculate;
i. Its relative
density
ii. Its density