PHYSICS TEST
FORM FOUR
Time 2.30 hrs
SECTION A
Answer all
questions from this section
1.
Choose
the correct answer form this question (2
marks each)
i.
Which
of the following is not the SI unit of pressure?
a)
Pascal
b)
N/m2
c)
N/m3
d)
No
answer
ii.
Water
of mass 3kg is heated from 260c to 970c. The specific
heat capacity of water is 4.2x103 J/kg0c. the amount of heat supplied
to the water is:
a)
3000J
b)
882,000J
c)
8888KJ
d)
0.999J
iii.
Which
one of the following is true about Heat?
a)
Heat
gained is equal to heat loss
b)
Heat
gain is not equal to heat loss
c)
No
answer
d)
Bothe
a and b
iv.
A
transparent medium bounded by two surface
of regular shape is:
a)
Lens
b)
Concave
mirror
c)
Convex
mirror
d)
Both
a and b
v.
The
properties of light is__________
a)
Travel
as the speed of sound in air
b)
Travel
in straight line
c)
Both
a and b
d)
No
answer
2.
In
the following questions match the items in list A with their corresponding in
list B by writing the letter of the right answer from list B to its
corresponding in list A. the answer should be written in th box given below
this table. (10marks)
|
LIST
A
|
LIST
B
|
|
i.
No free movement of electrons
ii.
Used to detect the presence of charge
iii.
Has positive charge
iv.
Has a negative charge
v.
Ability of a capacity to store charge
vi.
Arrangement of capacitors having constant quantity
of charge
vii.
Giant electric spark that arises due to discharge
of atmospheric electricity.
viii.
A long pointed conductor at the top reaching high
above the highest point of a building connected to earth by a thick cable or
rod
ix.
Condition for the lightening to take place
x.
Types of capacitor
|
A.
Moisture-laden warm air near the earth surface.
B.
Moisture-laden cold and hot air near the earth
surface.
C.
Conductor
D.
Insulator
E.
Paper capacitor
F.
Plastic coke capacitor
G.
Lightning conductor
H.
Rightning conductor
I.
Lightning
J.
Right
K.
Parallel arrangement
L.
Series arrangement
M.
Capacitive
N.
Capacitance
O.
Goad leaf electroscope
P.
Gold leaf charge
Q.
Electrons
R.
Neutrons
S.
Proton
T.
Electrophorus
U.
Electrostatic
|
3.
Fill
the blanks from this question. (14
marks)
i.
________is
the mass per unit volume.
ii.
_______is
the SI unit of density
iii.
Pressure
is the force acting normally per unit______________
iv.
Work
done can be defined as __________________________ and the SI unit
is_______________________
v.
Law
floatation state that_____________
vi.
Refractive
index is__________________
SECTION B
Answer only six
questions from this section.
4.
(a)
What is pressure? Explain the reason why piercing tools such as needles and
nails have sharpened tips? (2 marks)
(b) Water of density 1000kg/m3 is maintaining a column of 10m
high. A liquid x has a density of 2500kg/m3. Find the height of x
which will be exerted the same pressure as the above column water. (5 marks)
(c)
A force of 5N is applied to the smaller piston of a hydraulic press. If the
smaller piston has a cross-sectional area of 0.001m2 and the large
piston has a cross-sectional area of 0.1m2, find the force produced
on the large piston. (4 marks)
5.
(a)
What do you understand the term energy? Mention four form of energy. (3 marks)
(b)
Differentiate between mechanical energy
and kinetic Energy. (2 marks)
(c) State the
law conservation of energy. How much power is required to accelerate a 1000kg
car from rest to 26.7m/s in 8s? (6
marks)
6.
(a)
Define the following term
i.
Pole
(1mark)
ii.
Radius
of curvature(1mark)
iii.
Principle
focus(1mark)
(b) An object 3cm high is placed
30cm away from a concave mirror of focal length 12cm. using the mirror formula,
find the position, height and nature of the image. (5marks)
(c) Mention one uses of concave
mirror and one uses of convex mirror. (3marks)
7.
(a)
Define the following term
i. Potential difference (1mark)
ii.Electromotive cell (1mark)
iii.Internal resistance (1mark)
(b) Two cells A and B of emf each 6V and internal resistance 5Ω and 6Ω.
Respectively are connected to a resistor of 10Ω. Find the current in the
circuit if:
i.
The cells are connected in series (4 marks)
ii.
The
cells are connected in parallel(4 marks)
8.
i.
explain why ship floats on water while a small iron sinks. (3marks)
ii.
A liter of milk weighs 1032g. The butterfat which it contains to the extent of
4.0% by volume has a density of 0.865g/mL. What is the density of the fat-free
“skimmed “milk? (8 marks)
9.
Give
a short notes of the following terms (11marks)
i.Why weight of the body varies.
ii.Velocity ratio
iii.Mechanical advantage
iv.A tractor has large tyres in its center.
v.It is impossible to walk on sand
vi.How to prove that the light travel in straight line
10.
Define
the following term used in heat.(11 marks)
i.Fusion
ii.Melting point
iii.Boiling point
iv.Latent heat
v.Specific latent heat.
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