A body moves with a constant speed but has an acceleration. this process if it
Answer
(B)
moves in a circle
3
A ball is projected horizontally from the top of a hill with a velocity of 20m-1. If it reaches the ground 4 seconds later, what is the height of the hill? (g = 10ms-2)
Answer
(C)
80m
4
A body moving with uniform acceleration has two points(5, 15) and (20, 60) on the velocity-times graph of its motion. Calculate
Answer
(B)
3.00ms-2
5
the diagram above shows the position of a simple pendulum set in motion. At which of the positions does the pendulum have maximum kinetic energy?
Answer
(C)
3
6
An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10ms-2)
Answer
(A)
3.0s
7
power is defined as the
Answer
(E)
energy expended per unit time
8
The product PV where P is pressure and V is volume has the same unit as
Answer
(B)
work
9
The diagram represents a block-and-tackle pulley system on which an effort of 50N is just able to lift a load of weight W. If the efficiency of the machine is 40%. find the value of W
Answer
(D)
120N
10
A boatman facing north wants to cross a flowing river to a point directly opposite its position at the other bank. If the river is flowing eastwards, in what direction should he row his boat?
Answer
(C)
north-west
11
The diagram above represents six maximum and minimum thermometer. If the temperature of the surrounding falls, which of the following correctly states how the thermometer would respond to the change in temperature?
Answer
(B)
S1 would not move but S2 would move upwards
12
A wire, 20m long is heated from a temperature of 5oC to 55oC. If the change in length is 0.020m, calculate the linear expansivity of the wire
Answer
(C)
2.0 x 10-5k-1
13
A water fall is 420m high. Calculate the difference in temperature of the water between the top and bottom of the water fall. Neglect heat loses(g = 10.0m-2 specific heat capacity of water = 4.20 x 10\(^3\) JKg-1 K-1)
Answer
(B)
1.0oC
14
The set-up illustrated above shows a capillary tube of uniform cross-sectional area in two different arrangements. Using the data in the diagrams. Calculate the pressure of the atmosphere
Answer
(B)
75cm of Hg
15
A fixed mass of gas of volume 600cm3 at a temperature of 27oC is cooled at constant pressure to a temperature of 0oC. What is the change in volume?
Answer
(A)
54cm2
16
The boiling point of a liquid depends on the following except the
Answer
(C)
volume of the liquid
17
A team trap is a component of the apparatus used in determining the specific latent heat of vaporisation of steam. In the steady steady state, the steam trap
Answer
(C)
ensures that only dry steam gets into the calorimeter
18
a tap supplies water at 26oC while another supplies water at 82oC. If a man wishes to bathe with water at 40oC the ratio of hot mass of hot water to that of cold water required is
Answer
(A)
1:3
19
Melting ice cools an orange drink far better than the same mass of ice-cold water because
Answer
(D)
ice absorbs latent heat during melting
20
The saturation vapour of a liquid depends on its
Answer
(B)
temperature
21
Two forces, whose resultant is 100N are perpendicular to each other. If one of them makes an angle of 60o with the resultant, calculate the magnitude. (Sin 60o = 0.8660, Cos 60o = 0.500)
Answer
(E)
50.0N
22
The graph above shows the expansion of water as the temperature increases from 0oC. Which of the following deductions from the graph are true? i. Water has its maximum density at Q. ii. The volume of water is greater at 0oC than at 4oC. iii. The volume of water decreases uniformly when cooled from 100oC. iv. When water solidifies, its volume increases
Answer
(E)
i, ii and iv only
23
Two mirrors are inclined as shown in the diagram. A ray of light RO strikes the arrangement at O and emerges along PO. The emergent ray has been deviated through
Answer
(B)
180o
24
In the arrangement illustrated above, Y and B are yellow and blue transparent light filters respectively through the filters is
Answer
(E)
black
25
A ray of light is incident at an angle of 30o on a glass prism of refractive index 1.5. Calculate the angle through which the ray is minimally deviated in the prism. (The medium surrounding the prism is air)
Answer
(A)
10.5o
26
Calculate the refractive index of the material of the glass block shown in the diagram if YZ = 4cm
Answer
(D)
1.67
27
An image which can be formed on a screen is said to be
Answer
(E)
real
28
Which of the following are true of plane-polarised light? i. Plane polarisation of light is the formation of hydrogen bubbles on the particle of light. ii. Plane polarisation of light is the splitting of light into its spectral components iii. A plane polarised light vibrates in one plane. iv. Polarisation of light is characteristic of transverse vibration
Answer
(D)
iii and iv only
29
At which of the following distances from the lens should a slide be placed on a slide projector if f is the focal length of the projector length?
Answer
(C)
equal to f
30
what part of the camera corresponds to the iris of the eye?
Answer
(D)
diaphram
31
Which of the following is not a mechanical wave?
Answer
(C)
radio waves
32
Which of the following remains unchanged as light travels from one medium to the other? i. speed. ii. wavelength. iii. frequency.
Answer
(C)
iii only
33
Which of the following statements about wave is not correct? i. A wavefront is a line which contains all particles whose vibration are in phase. ii. The direction of propagation of a wave is the link drawn parallel to the wavefront. iii. A wavefront is a circle which is common to particles that are in the same state of disturbance
Answer
(E)
ii and iii only
34
What type of motion does the skin of a talking drum perform when its being struck with the drum stick?
Answer
(C)
vibratory
35
The sound from a bell in an enclosed jar gradually faints away while the jar is being evacuated. Which of the following explains this observation?
Answer
(D)
There is no more material medium
36
Which of the following statements is true of the diagram shown above?
Answer
(A)
the two point, A and B are in phase
37
A man standing 300m away from the wall sounds a whistle. The echo from the wall reaches him 1.8sec. later, calculate the velocity of sound in air
Answer
(B)
333.3ms-1
38
In which of the following is a stationary wave produced? i. A vibrating turning fork held near the end of a resonance tube closed at one end. ii. A string tightly stretched between two points and plucked at its middle. iii. The tuning fork vibrating in air
Answer
(C)
i and ii only
39
A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field b in the direction of the field. The force on the particle is
Answer
(D)
O
40
If the frequency of the e.m.f. source in the a.c. circuit illustrated above is \(\frac{500}{\pi}\)Hz. What is the reactance of the inductor?
Answer
(C)
900
41
Two objects of masses 80kg and 50kg are separated by a distance of 0.2m. If the gravitational constant is 6.6 x 10-11Nm kg, calculate the gravitational attraction between them.
Answer
(D)
6.6 x 10-6N
42
Two capacitors C1 and C2 are connected as shown in the diagram. The capacitance C2 is twice C1 when the key is opened the energy stored up in C1 is W. If the key is later closed and the system is allowed to attain electrical equilibrium, the total energy stored in the system will be
Answer
(E)
3W
43
In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most?
Answer
(E)
E
44
Which of the following is stored by dry Leclanche cell?
Answer
(A)
chemical energy
45
Using the data in the circuit illustrated above, calculate the value of R
Answer
(E)
50.00\(\Omega\)
46
A 90W immersion heater is used to supply energy for 5 minutes. The energy supplied is used to completely melt 160g of a solid at its melting point. Calculate the specific latent heat of the solid.
Answer
(D)
168.75Jg-1
47
In the circuit above R is a resistor whose resistance increases with an increase in temperature. L1 and L2 are identical lamps. If the temperature of R increases
Answer
(E)
L1 and L2 becomes brighter
48
A house is supplied with a 240V a.c mains. To operate a door bell rated at 8v, a transformer is used if the number of turns in the primary coil of the transformer is 900. calculate the number of turns in the secondary coil of the transformer
Answer
(A)
30
49
The diagram above shows a current carrying wire between the poles of a magnet. In which direction would the wire tend to move?
Answer
(B)
out of the paper
50
An induction coil is generally used to?
Answer
(E)
produce a large output voltage
51
The unit of stress is
Answer
(C)
Nm-2
52
Which of the following statements above viscosity are correct? when a ball falls through a viscous liquid i. viscosity opposes the gravitational force on the ball. ii. viscosity opposes the upthrust on the ball. iii. viscosity is in the same direction as the upthrust on the ball. iv. as the ball falls faster the more viscous the liquid is
Answer
(A)
i and iii only
53
Which of the following statements is not correct? Isotopes of an element have
Answer
(D)
different proton numbers
54
plane as 63cm of HG while a ground observer records a reading of 75cm of Hg with his barometer. assuming that the density of air is constant, calculate the height of the plane above the ground. (Take the relative densities of air and mecury as 0.00136 and 13.6 respectively
Answer
(E)
120,000m
55
When a metal surface is irradiated, photoelectrons may be ejected from the metal. The kinetic energy of the ejected electrons depends on the
