VIJAYAGIRI PUBLIC SCHOOL
PHYSICS MOCK TEST 1 – TERM 1
CLASS: XI MARKS: 35
TIME: 90 min
General Instructions:
1. The Question Paper contains three sections.
2. Section A has 25 questions. Attempt any 20 questions.
3. Section B has 24 questions. Attempt any20 questions.
4. Section C has 6 questions. Attempt any 5 questions.
5. All questions carry equal marks.
6. There is no negative marking.
SECTION A
This section consists of 25 multiple choice questions with overall choice to
attempt any 20 questions. In case more than desirable number of questions are
attempted, ONLY first 20 will be considered for evaluation.
1. The ratio of one micron to one nanometer is
a) 10 3
b) 10 -3
c) 10 -6
d) 10 -9
2. Which one of the following is not a derived unit?
a) Joule
b) Watt
c) Kilogram
d) Newton
3. Which of the following physical quantities has same unit in all the system
of units
a) Mass
b) Length
c) Time
d) None of these
4. The numbers 3.845 and 3.835 on rounding off to three significant figures
will be
a) 3.85 and 3.84
b) 3.84 and 3.83
c) 3.85 and 3.843
d) 3.84 and 3.84
5. The area under velocity – time graph for a particle in a given interval of
time represents
a) Velocity
b) Acceleration
c) Work done
d) Displacement
6. The numerical ratio of distance to displacement is
a) always equal to one
b) always less than one
c) always greater than one
d) equal to or more than one
7. A body covers 20 m, 22m, 24 m in 8 th, 9 th and 10 th seconds
respectively. The body starts
a) from rest and moves with uniform velocity
b) from rest and moves with uniform acceleration
c) with an initial velocity and moves with uniform acceleration
d) with an initial velocity and moves with uniform velocity
8. Which of the following is true regarding projectile motion?
a) Horizontal velocity of projectile is constant
b) Vertical velocity of projectile is constant
c) Acceleration is not constant
d) Momentum is constant
9. Centripetal acceleration is a
a) Constant vector
b) Constant scalar
c) Magnitude changing vector
d) Not a constant vector
10. A motorboat is racing towards north at 25 km/h. The water current in
that region is 10 km/h in the direction of 600 east of south. The resultant
velocity of the boat is
a) 11 km/h
b) 22 km/h
c) 33 km/h
d) 44 km/h
11. From a building, two balls A and B are thrown such that A is thrown
upwards and B downwards with the same speed, If vA and vB are their
respective velocities on reaching the ground then
a) vB > vA
b) vB = vA
c) vB < vA
d) their velocities depend on their masses
12.Which of the following is a self-adjusting force?
a) Static friction
b) Rolling friction
c) Sliding friction
d) dynamic friction
13. A cyclist bends while taking a turn to
a) Reduce friction
b) Generate required centripetal force
c) Reduce apparent weight
d) Reduce speed
14. Swimming is based on
a) Newton’s first law
b) Newton’s second law
c) Newton’s third law
d) None of these
15. A 120 g mass has a velocity v = 2 i + 5 j m/s at a certain instant. Its
kinetic energy is
a) 3. 45 J
b) 4 J
c) 5 J
d) 1.74 J
16. Which of the following is not a conservative force?
a) Frictional force
b) Magnetic force
c) Gravitational force
d) Electrostatic force
17. Which of the following is a unit of power?
a) Kilowatt watt hour
b) Watt
c) erg
d) calorie
18. When two spheres of equal masses undergo glancing elastic collision
with one of them at rest, after collision they will move
a) Opposite to one another
b) In the same direction
c) Together
d) At right angle to each other
19. Centre of mass of a body
a) Always lies at the geometrical centre
b) Lies always inside the body
c) Lies always outside the body
d) May lie within or outside the body
20. Which of the following is a correct relation between linear velocity and
angular velocity?
a) v = r x ω
b) v = ω x r
c) ω = r x v
d) ω = v x r
21. Analogue of mass in rotational motion is
a) Moment of inertia
b) Torque
c) Radius of gyration
d) Angular momentum
22. Which of the following principles a circus acrobat employs in his
performance?
a) Conservation of energy
b) Conservation of linear momentum
c) Conservation of angular momentum
d) Conservation of mass
23. The height of geostationary satellite is approximately
a) 1000 km
b) 3600 km
c) 36000 km
d) 850 km
24. The value of g is
a) maximum at poles
b) maximum at equator
c) same everywhere
d) minimum at poles
25. If M is the mass of earth and R is its radius, the ratio of acceleration due
to gravity and gravitational constant is
a) R2/ M
b) M / R2
c) M R2
d) M / R
SECTION B
This section consists of 24 multiple choice questions with overall choice
to attempt any 20 questions. In case more than desirable number of
questions are attempted, ONLY first 20 will be considered for evaluation.
26. The distance of the moon from earth is about 60 times the radius of the
earth. What will be the diameter of earth (approx. in degrees) as seen
from the moon?
a. 1 0
b. 2 0
c. 3 0
d. 4 0
27. Two resistors of resistances R1 = (300 +/- 3) Ω and R2 = (500 +/- 4) Ω
are connected in series. The equivalent resistance of the series
combination is
a. (800 +/- 1) Ω
b. (800 +/- 7) Ω
c. (200 +/- 7) Ω
d. (200 +/- 1) Ω
28. The velocity of a particle v at an instant t is given by v = at + bt 2. The
dimension of b is
a. [L]
b. [LT-1]
c. [LT-2]
d. [LT-3]
29. The given acceleration-time graph represents which of the following physical
situations?
a. A cricket ball moving with a uniform speed is hit with a bat for a
very short time interval
b. A ball is falling freely from the top of a tower
c. A car moving with constant velocity on a straight road
d. A football is kicked into the air vertically upwards
30. Position-time graph for motion with zero acceleration is
a.
b.
c.
d.
31. The (x, y, z) coordinates of two points A and B are given respectively as
(0, 4, -2) and (-2, 8, -4). The displacement vector from A to B is
a. -2i + 4j -2k
b. 2i - 4j +2k
c. 2i + 4j -2k
d. -2i - 4j -2k
32. Rain is falling vertically with 3ms–1 and a man is moving due North with
4ms–1. In which direction he should hold the umbrella to protect himself
from rain?
a. 37° North of vertical
b. 37° South of vertical
c. 53° North of vertical
d. 53° South of vertical
33. A boy swims in a straight line to reach the other side of a river. His
velocity is 5 ms–1 and the angle of swim with shore is 30°. Flow of river
opposes his movement at 2 ms–1. If width of river is 200 m, where does he
reach the other bank?
a. 103 m from O’ downstream
b. 186 m from O’ downstream
c. 186 m from O’ upstream
d. 106 m from O’ upstream
34. A rigid ball of mass m strikes a rigid wall at 60° and gets reflected
without loss of speed as shown in the figure. The value of impulse
imparted by the wall on the ball will be
a. mv
b. 2mv
c. mv/2
d. mv/3
35. A pump on the ground floor of a building can pump up water to fill the
tank of volume 30 m3 in 15min. If the tank is 40m above the ground, and
the efficiency of the pump is 30 %, the power consumed by the pump
is (g = 10 ms−2)
a. 44.4 kW
b. 36.5 kW
c. 60.5 kW
d. 52.5 kW
36.The momentum of a body is increased by 25%. The kinetic energy is
increased by about
a. 25 %
b. 5 %
c. 56 %
d. 38 %
37. Which of the following statements is correct?
a. Acceleration due to gravity increases with increasing altitude
b. Acceleration due to gravity increases with increasing depth
c. Acceleration due to gravity increases with increasing latitude
d. Acceleration due to gravity is independent of the mass of the earth
38. A particle of mass M is placed at the centre of a uniform spherical shell
of mass 2M and radius R. The gravitational potential on the surface of the
shell is
a. – GM/R
b. – 2 GM/R
c. – 3 GM/R
d. zero
39.Which of the following statements is correct regarding a geostationary
satellite?
a. A geostationary satellite goes around the earth in east-west
direction.
b. A geostationary satellite goes around the earth in west-east
direction,
c. The time-period of a geostationary satellite is 48 hours.
d. The angle between the equatorial plane and the orbital plane of
geostationary satellite is 900.
40. What will be the position of centre of mass of a half disc of uniform
mass density as shown
a. 2a/π
b. 4a/3π
c. a/π
d. 2a/3π
41. An air compressor is powered by a 200 rad/s electric motor using a V-
belt drive. The motor pulley is 8 cm in radius, and the tension in the V-
belt is 135 N on one side and 45 N on the other. The power of the motor
will be
a. 1.44 kW
b. 14.4 kW
c. 2.88 kW
d. 28.8 kW
For which he following does the Centre of mass lie
outsid the body?
For which of the following does the Centre of mass lie
outside the body?
42. For which of the following does the centre of mass lie outside the body?
a. A pencil
b. A shotput
c. A dice
d. A bangle
43.The moments of inertia of two rotating bodies A and B are IA and IB (IA >
IB). If their angular momenta are equal, then
a. Kinetic energy of A = Kinetic energy of B
b. Kinetic energy of A > Kinetic energy of B
c. Kinetic energy of A < Kinetic energy of B
d. Kinetic energy of the two bodies cannot be compared with the
given data
44. A police van moving on a highway with a speed of 30 km h-1 fires a
bullet at a thief's car speeding away in the same direction with a speed of
192 km h-1. If the muzzle speed of the bullet is 150 m s-1, with what speed
does the bullet hit the thief's car?
a. 95 m/s
b. 105 m/s
c. 115 m/s
d. 125 m/s
45. Given below are two statements labelled as Assertion (A) and
Reason (R).
Assertion (A): A dimensionally wrong or inconsistent equation must be
wrong.
Reason (R): A dimensionally consistent equation is an exact or a correct
equation.
Select the most appropriate answer from the options given below:
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false and R is also false.
46.Assertion: Velocity-time graph for an object in uniform motion along a
straight path is a straight line parallel to the time axis.
Reason: In uniform motion of an object, velocity increases as the square
of time elapsed.
Select the most appropriate answer from the options given below:
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false and R is also false.
47.Assertion: A particle starting from rest and moving with uniform
acceleration travels a length of x and 3x in the first two and next two
seconds.
Reason: Displacement is directly proportional to velocity.
Select the most appropriate answer from the options given below:
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false and R is also false.
48.Assertion: For a freely falling object, the net external force is just the
weight of the object.
Reason: In this case, the downward acceleration of the object is equal to
the acceleration due to gravity.
Select the most appropriate answer from the options given below:
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false and R is also false.
49. Assertion: Moon has no atmosphere.
Reason: The escape velocity of moon is less than that of earth.
Select the most appropriate answer from the options given below:
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false and R is also false.
SECTION C
This section consists of 6 multiple choice questions with an overall
choice to attempt any 5. In case more than desirable number of questions
are attempted, ONLY first 5 will be considered for evaluation.
50.Two masses m1 = 1kg and m2 = 2 kg are connected by a light inextensible
string and suspended by means of a weightless pulley as shown in the
figure. Assuming that both the masses start from rest, the distance
travelled by the centre of mass in two seconds is (take g = 10 m/s2)
a. 20/9 m
b. 40/9 m
c. 2/3 m
d. 1/3 m
51. Match Column I with Column II.
Column I Column II
(A) When a body does work (p independent of time
against friction, its kinetic )
energy
(B) Work done by a body is (q time
)
(C) Power of a body varies (r) force must be conservative
inversely as
(D) When work done over a (s) Decreases
Column I Column II
closed path is zero
a. A − p , B − q , C− r , D – s
b. A − q , B − r , C− s , D – p
c. A − s , B − r , C− q , D – p
d. A − s , B − p , C− q , D – r
Case study:
Read the following paragraph and answer the questions:
In the absence of air resistance, all bodies falls with same same
acceleration near the surface of the earth. This motion of a body falling
towards the earth from a small height is called free fall. The acceleration
with which a body falls is called acceleration due to gravity and it is
denoted by g.
52.The time of ascent of a body thrown vertically upward with initial
velocity u is
a) t = u/2g
b) t = u/g
c) t = u2/g
d) t = u/g2
53. The maximum height attained by a body thrown vertically upward with
initial velocity u is
a) h = u2/2g
b) h = u/2g
c) h = u2/g
d) h = 2u2/g
54. The total time of flight to come back to the point of projection of a body
thrown vertically upward with initial velocity u is
a) t = 2u/3g
b) t = u/2g
c) t = 2u/g
d) t = u2/g
55. For a freely falling body, which of the following equation is incorrect
a) h - ut = (1/2) gt2
b) v2 – u2 = 2gh
c) h = (1/2) ut + gt2
d) (v-u)/g = t
