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WorksheetsPhysics Evaluation Test
Total questions: 50
Worksheet time: 2hrs 40mins
The unit of power is
Watt
Kilogram
Metre
Decibel
The speed of a bus increases uniformly from 10 m/s to 50 m/s in 12 s. Calculate the distance travelled during the entire period
120 m
360 m
480 m
600 m
A cricket ball is thrown upward at an angle of 600 with an initial velocity of 80 m/s. Calculate the maximum height reached. (g=10 m/s2)
34 m
96 m
122 m
240 m
Which of the following law is equivalent to Newton's first law of motion? Law of
conservation of energy
gravitation
inertia
solid friction
An effort of 66250 N was applied through a distance of 32 m, on a crane to lift a container weighing 424000 N through a vertical height of 4 m. What is the efficiency of the machine?
12.5 %
80 %
64 %
51.2 %
"Action and reaction are equal and opposite', is what Newton's law of motion?
first
second
third
fourth
The trajectory of a projectile is
parabolic
cyclic
conical
elliptical
Which of the following pairs of physical quantities are vector?
force and mass
displacement and momentum
acceleration and distance
speed and velocity
A line RS of magnitude 10 units is specified by the coordinates R(6,4) and S(-2, K), determine the positive value of K
4
8
14
10
Each of the following physical quantities is classified as vector or scalar quantity. Which of the classification is correct?
Electric potential ( Vector)
Momentum ( Scalar)
Gravitational field intensity ( Scalar)
magnetic flux density (Vector)
A wheel and axle of radii 800 mm and 200 mm respectively is used to raise a load of 800 N by application of 250 N effort. Calculate the efficiency of the machine.
85 %
60 %
80 %
20 %
Which of the following simple machine is a second class lever?
wheel barrow
crowbar
claw hammer
sugar tong
A particle accelerates uniformly from rest at 6.0 m/s2 for 8s and then decelerates uniformly to rest in the next 5s. Determine the magnitude of the deceleration.
24.0 m/s2
30.0 m/s2
9.6 m/s2
48.0 m/s2
A body starts from rest and accelerates uniformly at 5 m/s2 until it attains a velocity of 25 m/s. Calculate the time taken to attain this velocity.
2.5 s
5.0 s
10.0 s
125.0 s
The following pairs of quantities have the same units EXCEPT ...............
Impulse and momentum
force and weight
velocity and acceleration
energy and work
A body of mass 5 kg moving with a velocity of 10 m/s collides with a stationary body of mass 6 kg. If the two bodies stick together and move in the same direction after collision, calculate their common velocity.
4.55 m/s
12.00 m/s
30.00 m/s
50.00 m/s
Uniform speed occurs when there is equal change of
distance in equal time
displacement in equal time
velocity in equal time
acceleration in equal time
A car accelerates uniformly fro rest at 5 m/s2, determine its speed after 10 s.
0.5 m/s
2.0 m/s
25.0 m/s
50.0 m/s
Two forces 6 N and 8 N act on a body of 50 kg at right angle to each other. Calculate the acceleration of the body.
5.0 m/s2
0.2 m/s2
2 m/s2
0.5 m/s2
The slope of a straight line displacement-time graph gives
uniform speed
uniform velocity
uniform acceleration
distance covered
A boy travels 12 km eastwards and to a point B and then 5 km southwards to another point C. Calculate the difference between the magnitude of the displacement of the boy and the distance travelled by him.
7 km
4 km
13 km
17 km
Compute the magnitude of the resultant of two forces 20 N and 15 N inclined at 900 to each other.
25 N
30 N
35 N
40 N
A uniformly retarded object comes to rest in 30s after travelling a distance of 60 m. Calculate the initial velocity of the object.
2.0 m/s
3.0 m/s
4.0 m/s
8.0 m/s
The horizontal distance covered by a projectile between the point of throw to the point it lands is called ..........
maximum height
time of flight
acceleration point
range
Which of the following is the correct unit of impulse
N/s
Ns
Ns2
N/s2
The force that prevents a whirled stone from veering off its circular path is called
centrifugal
frictional
centripetal
gravitational
A body weighs X Newtons in air, Y Newtons when fully immersed in water and Z Newtons when fully immersed in another liquid. Which of the following gives correct expression for relative density of the liquid?
X/Z-Y
X - Z/X - Y
Y- Z/Y-X
Z-X/Z-Y
A fixed mass of air is 300 cm3 at 300 C, what is it temperature when the volume is reduced to 1/3 of its original volume at the same pressure?
10 K
101 K
109 K
90 K
A measuring cylinder with an office pin at the bottom is filled up with water. When viewed vertically from above, the pin appears to be at a depth of 10 cm. Calculate the actual depth of the cylinder. ( Refractive index of water is 1.33)
7.52 cm
10.00 cm
12.66 cm
13.3 cm
Which of the following are the source and the detector of infra-red rays respectively?
Electric sparks and photo transistor
Hot body and therrmopile
radioactive nuclide and photographic plate
transmitter and aerials
Which of the following paired words will best complete the statement about a long sighted person? The image of an object placed _____________ the near point of his eye is formed _____________the retina.
before, before
before, on
on, on
beyond, behind
Which of the following field(s) will exert a force on a nail placed in it?
(I) Gravitational field
(II) Electric field
(III) Magnetic field
I only
II only
III only
I and II only
Calculate the force of attraction between two objects A and B, Of masses 10 kg and 20 Kg respectively placed 20 cm apart. (G = 6.67 X 10-11 Nm2/Kg2)
3.34 X 10-11 N
6.67 X 10-10 N
3.34 X 10-7 N
3.34 X 10-6 N
An electric charge of 20 μ C flows through a metallic conductor in 5 X 10-9. Determine the current flowing in the circuit.
1.0 X 10-3 A
4.0 X 10-3 A
1.0 X 103 A
4.0 X 103 A
A transformer has 400 turns in its primary coil and 250 turns in it secondary coil, what voltage will be obtained from the secondary coil if the primary coil is connected to a 240 V main supply?
150 v
120 v
250 v
384 v
A quantity of salt was added to a cup of cold water and left undisturbed. After sometime the mixture becomes a salt solution. This phenomenon is due to
Brownian motion
capillarity
convection
diffusion
Light of wavelength 2.2 X 10-7 m is incident on a metal surface of work function 3.5 X 10-19 J. Calculate the maximum kinetic energy of the emitted electrons. ( h= 6.6 X 10-34 Js, c= 3.0 X108 m/s)
9.00 X 10 -19 J
5.50 X 10-19 J
4.84 X 10-19 J
4.50 X 10-19 J
The uncertainty in measurement of position of a particle is 3.3 X 10-10 m. What is the uncertainty in determining the momentum of the particle? ( h= 6.6 X10-34 Js)
2.2 X10-43 Ns
1.0 X 10-34 Ns
2.0 X 10-24 Ns
5.0 X 10-23 Ns
Which of the following devices converts solar radiation to thermal energy?
Dynamo
Thermocouple
photocell
Focusing collector
Which of the following is NOT a condition for producing large e.m.f in generator.
Increasing the number of turns of the magnet
Increasing the speed of the magnet
Increasing the strength of the magnetic field
Interchanging the polarity of the magnet
Electrical power is transmitted at high voltage and low current so as to
increase the magnitude of the current
minimize energy losses
minimize the risk of transmission
reduce cost of transmission
A car starts from rest and travels at uniform acceleration until it attains a velocity of w after x seconds. Which of the expressions below correctly represent the distance covered by the car?
wx/2
wx2/2
w2/2x
wx/4
The frequency of a vibrating spring is 4 Hz. Determine the time it will take to make 20 Oscillations.
0.2 s
5.0 s
16.0 s
24.0 s
A stone is pulled along a horizontal plane by a constant force of 20 N at an angle of 300 to the plane. Calculate the work done in moving the stone through a distance of 10 m.
100 J
115.5 J
173.2 J
200.0 J
The upper and lower fixed points on a thermometer are given as 150 mm and x respectively. If a temperature of 400 C corresponds to a reading of 70 mm on the thermometer, determine the value of x
16.7 mm
14.0 mm
26.7 mm
85.7 mm
An electric heater rated 60 W is used to heat 150 g of water from 400C to 1000C in a calorimeter. Calculate the time in minutes fo rwhich the current flowed.( S.H.C of water = 4200 Jkg-1K-1)
3.5
5.3
10.5
6.3
An object is placed 15 cm in front of a concave mirror of radius of curvature 20 cm. Calculate the magnification of the image produced.
2.5
2.0
3.0
4.5
Two parallel metal plates separated by a distance of 5.0 cm, are charged to a voltage of 20 V. Calculate the electric field intensity between them.
4.0 V/m
25.0 V/m
100.0 V/m
400.0 V/m
A radioactive material has a half-life of 5 years. What is the fraction of the original radioactive nuclei that will be lost after 20 years?
1/32
1/16
1/8
7/8
The proton and neutron numbers present in an atom represented by XYA are __________ and ____________ respectively.
X and X-Y
X and X+Y
Y and X
Y and X - Y
