Paper for Entry Test Preparation
Physics 1st year Chapter No. 4
Total marks:- 200 Time
allowed 40 minutes
Note:-
Fill the appropriate answer of the following questions in the answer sheet.
Double filling and erasing is not allowed. Each question carries equal marks
and for each wrong answer minus one is awarded.
1) The work performed on an object does not depend
on:
a)
Force applied b)
Angle at which force is inclined to the displacement
c)
Initial velocity of the object c)
Displacement
2) Work done is maximum when angle b/w force and
displacement is:
a)
0o b)
90o c)
180o d)
Non of these
3) The dimension of the work is same as that of:
a)
Torque b)
Angular momentum c) Linear
momentum d) Power
4) Work done along a closed path in a gravitational
field is:
a)
Maximum b)
Minimum c) Zero d) Unity
5) Which type of force can do no work on the
particle on which it acts:
a)
Frictional force b)
Gravitational force c)
Electric force d)
Centripetal force
6) Work done in lowering the bucket onto the well
is:
a)
Zero b)
Positive c)
Negative d)
Non of these
7) The total work done in moving the body up and
then down through the same height in a gravitational field is:
a)
mgh b)
Equal to its weight c) Weight
x height d) Zero
8) Which force is not a conservative force:
a)
Frictional force b)
Gravitational force c)
Electric force d)
Elastic spring force
9) When a wall is pushed by a person very strongly,
he has done:
a)
Maximum work b) Zero work c) Negative work d) Positive work
10) The sum of K.E and P.E of a falling body is:
a)
Constant at all points b)
Maximum at the top c) Maximum
just before hitting d) Non of all
11) The work done b/w two point in a conservative
field is independent of the:
a)
Direction b)
Force applied c) Path
followed d)
Displacement
12) A 2 Kg block is held 1 m above the floor for 50
sec, the work done is:
a)
Zero b)
150 J c)
100 J d)
980 J
13) Energy stored in the spring of a watch is
called:
a)
Potential energy b) Kinetic
energy c)
Gravitational energy d) Elastic
potential
energy
14) Work done on a body against force of gravity is
called:
a)
Potential energy b)
Kinetic energy c)
Gravitational energy d) Elastic
potential
energy
15) When two protons are brought closer potential
energy of both of them:
a)
Increases b)
Decreases c)
Remains same d) Non of
these
16) Escape velocity from surface of moon as compared
to that from earth surface is:
a)
Greater b)
Smaller c)
Equal d)
None of these
17) A particle of mass m has momentum p. Its kinetic
energy will be:
a)
½ mp b)
½ mp2 c)
2 p2 / m d)
½ p2 / m
18) The escape velocity of a particle of mass m from
Earth’s surface varies as:
a)
m2 b)
Öm c) mo d) m-2
19) The escape velocity of a projectile launched
from a planet depends upon:
a)
Mass of the projectile b)
Mass and radius of the projectile
c)
Mass and radius of the planet d)
Launching direction
20) The work donw in moving a body from Earth’s
surface up to infinity is known as:
a)
Elastic P. E b)
Absolute K. E c)
Absolute P. E d) Non
of these
21) The ability of a body to do work is called its:
a)
Power b)
Energy c)
Momentum d) None
of all
22) Energy possessed by a body due to its position
is called:
a)
Kinetic energy b)
Magnetic energy c)
Potential energy d) Non
of all
23) If the mass and speed of body are doubled, then
K. E:
a)
Remains same b)
Becomes 2 times c) Becomes
4 times d) Becomes 8 times
24) The force acting on a stationary body in the
gravitational field at any point is equal to:
a)
Gravitational mass b)
Acceleration c)
Weight d)
Inertia
25) The type/s of mechanical energy is/are:
a)
Kinetic energy b)
Potential energy c) Both
of these d) None of
all
26) The commercial unit of electrical energy is:
a)
K Watt b)
K W h c)
Horsepower d) Joule
27) When a body is freely thrown form height
‘h’, its velocity just before touching the ground is:
a)
Ö2g/h b) Ö2/gh c)
2gh d)
Ö2gh
28) Watt x second is a unit of:
a)
Force b)
Work c)
Power d)
None of these
29) If a machine does work at the rate of 0.5 joules
in every two seconds, then it power is said to be:
a)
1 watt b)
4 watt c)
0.5 watt d)
0.25 watt
30) One KWh is equal to:
a)
3.6 x 102 J b)
3.6 KJ c)
3.6 x 101 KJ d)
3.6 MJ
31) Which of the following options contain the
quantities not related to each other:
a)
Power, velocity, force b) Force,
density, work c) Force, work,
displacement d) Work, power, time
32) The consumption of energy by a 60 W bulb in 2
minutes is:
a)
2 watt-hr b) 120
watt-hr c) 30
watt-hr d) None
of all
33) Power is a:
a)
Vector quantity b)
Scalar quantity c) Base
quantity d) All of
above
34) The energy obtained by tapping the energy of the
hot molten areas inside the Earth is called:
a)
Gravitational energy b)
Geothermal energy c)
Geological energy d) Plasma
energy
35) Gravitational interaction b/w earth and the moon
is the cause of:
a)
Solar energy b)
Moon energy c)
Geothermal energy d) Tidal
energy
36) Most of the geysers occur in:
a)
Volcanic regions b) Magnetic regions c)
Hot crust region d) Cold
regions
37) Which of the following is the part of biomass:
a)
Crop residue b)
Natural vegetation c) Animal
drug d) All of
above
38) The heat energy produced by the radioactive
decay is called:
a)
Electronic energy b) Nuclear energy c) Nucleonics energy d) Radioactive energy
39) The velocity can be defined in terms of power
units as:
a)
Ratio of force to power b) Product
of power and force c) Ratio of power to force d)
None of all
40) Tick the correct statement:
a)
Watt and watt-hr represents the same quantity b)
Watt is for energy and watt-hr represents force
c)
Watt is for power and watt-hr is for energy d)
Non of above
41) Te consumption of energy by a 1000 watt heater
in half an hour is:
a)
5 Kwh b)
0.5 Kwh c)
2.5 Kwh d)
3.2 Kwh
42) Kinetic energy of a body of mass ‘m’ and
velocity ‘v’ is a:
a)
Vector as it contains velocity b)
Scalar as it contains mass
c)
Scalar as it can be written as ½ m(v.v) d)
Vector as it can be written as ½ m(v x v)
43) The force acting on a stationary body in the
gravitational field at any point is equal to:
a)
Gravitational mass b)
Acceleration c)
Weight d)
Inertia
44) In the formula Ug = GMm/r. ‘r’ is the
distance:
a)
From centre of the earth to the surface of the earth b) From centre of the earth up to infinity
c)
From surface of the earth up to infinity d)
Non of all
45) The escape velocity for a certain planet of
radius R can be found by:
a)
Ö2GM/R b) Ö2gR c)
Any of these d) Non
of these
46) When an electron and a proton is brought closer,
their potential energy will be:
a)
Increased b)
Decreased c)
Remain same d) None
of these
47) Work energy principle states that work doe on
the body by applied force is equal to change in:
a)
Potential energy b)
Kinetic energy c)
Linear momentum d) None of
all
48) Energy stores in the cells in the form of:
a)
Potential energy b)
Electrical energy c)
Electric potential energy d)
Electronic energy
49) If the force applies is parallel to the
direction of motion, then work done is:
a)
Maximum b)
Minimum c) Zero d) None of
these
50) The work done by a force keeping an object in
circular motion with constant speed is:
a)
Zero J b)
1 J c)
0.1 J d)
0.01 J
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