Exercise
1
Directions
for questions 1 to 25: Select
the correct alternate from the given choices.
1. The density of a substance in CGS system
is 5 g cm–3. Its density in S.I. System is _____ kg m–3.
(1) 5 x 10-3 (2) 5 x 103
(3) 5 x 102 (4) 5 x 10-2
2.
The densities of four
different solids, A, B, C and D are 5 kg nr3, 0.02 g cm'3,
0.001 kg cnr3 and 500 gnr3. If the same mass of all the
solids are taken, which will occupy the maximum space?
(1) A (2) B
(3) C (4) D
3. The
main scale division of a vernier callipers is 0.5 mm and the vernier scale has
20 divisions which coincide with 15 divisions of the main scale. The least
count of the vernier callipers is _____ mm.
(1) 0.125 (2) 0.375
(3) 0.5 (4) 0.875
4.
The main scale division of a vermier callipers is 0.1 cm and the vernier scale
has 20 divisions which coincide with 19 divisions of the main scale. When the
length of an object is measured with this instrument, the main scale reading is
5.4 cm and the 5th division of the vernier scale coincides with the main scale.
Calculate the length of the object.
(1) 5.405mm (2) 5.405cm
(3) 5.425mm (4) 5.425cm
5. The
length of an object measured using a vernier callipers is 6.77 cm. The vernier
scale has 10 divisions which coincide with 9 divisions of the main scale. If 1
MSD = 0.5 mm, find the coinciding division on the vernier scale.
(1) 1 (2) 2
(3) 3 (4) 4
6. The
following data is collected while measuring the diameter of a sphere with the
help of a vernier callipers. MSR = 4.5 cm, V .C .D = 7, In that vernier callipers
the total number of divisions are 10 which coincide with 9 divisions of the
main scale and MSD = 1 mm. Calculate the radius of the sphere in the CGS
system.
(1) 4.57cm (2) 2.285cm
(3) 457cm (4) 228.5cm
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1. 2
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2. 4
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3. 1
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4. 4
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5. 4
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6. 2
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Exercise 2
Directions
for questions 1 to 50: Select
the correct alternative from the given choices.
1. Which of the following is a vector
quantity?
(1) Speed (2) Velocity
(3) Density (4) Temperature
2. Which of the following is a scalar
quantity?
(1) Acceleration (2) Force
(3) Displacement (4) Distance
3. Which of the following is the unit of a
vector quantity?
(1) centimetre/second2 (2) degree celsius
(3) gram (4) second
4. Which of the following units always
represents a scalar quantity?
(1) centimetre/second (2) metre
(3) kilogram (4) newton
5. Which of the following statements is
true?
(1) A scalar quantity has
both magnitude and direction.
(2) A vector quantity has
magnitude only.
(3) Mass is a vector
quantity because it does not have any direction.
(4) Force is a vector
quantity because it has direction.
6. A
vehicle is moving in a circular path with uniform speed. Which of the following
conclusion can be drawn from this?
(1) The velocity of the vehicle is uniform.
(2) The vehicle is accelerating.
(3) The vehicle is retarding.
(4) Both (1) and (2)
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1. 2
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2. 4
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3. 1
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4. 3
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5. 4
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6. 2
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Exercise
3
Directions
for questions 1 to 50: Select the correct alternate from the given choices.
1. Dynamics is
(1) the study of dynamos and dynamites,
(2) branch of physics that deals with study of
types of motion.
(3) branch of physics that deals with the cause
of motion.
(4) branch of physics that deals with both the
types ot motion and also the cause of motion.
2. When a body is thrown upwards,
(1) its velocity decreases gradually because ot
gravitational force.
(2) its velocity does not decrease if it is
thrown in gravity free space
in universe.
(3) its velocity does not decrease.
(4) Both (l) and (2)
3. Which of the following is also known
as "law of inertia?
(1) Newton
(2) Newton
(3) Newton
(4) None of the above
4. State which of the following
statements is/are true.
(1) If a body is at rest, it has a tendency to
stay at rest even if a force is applied.
(2) If a body is in motion, it has a tendency to
be in motion even if a force is applied.
(3) If a body is at rest, it has a tendency to
get into motion soon after a force is applied.
(4) Both (1) and (2)
5. A bus starts suddenly, ihe standing
passengers in the bus tend to fall backward This is iin example of
(1) inertia of rest (2) inertia of motion
(3) inertia of direction (4)
None of these
6. When
a moving bus suddenly lakes a turn towards the left, the person appears to move
towards the right, This is an example of
(1) inertia of rest (2) inertia of motion
(3) inertia of direction (4) None of these
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1. 4
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2. 4
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3. 1
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4. 4
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5. 1
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6. 3
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Exercise 4
Directions
for questions 1 to 50: Select
the correct alternative from the given choices.
1. Two bodies of
masses of 4 g and 8 g move with equal kinetic energy, the ratio of the
magnitudes of their linear momenta are
(1) 1:2 (2) 
(3) 1 : 16 (4) 2 : 1
2. Calculate the
power of the engine used to lift 500 litres of water in 5 minutes to a height
of 15m. (Takeg= lOms'2)
(1) 2500 W (2) 25 W
(3) 250 W (4)
500 W
3. What is the work done by a man
against gravity holding a luggage of mass 40 kg over his head?
(1) 20 J (2) 10 J
(3) zero (4)
40 J
4. A tennis ball
is dropped from a height of 30 m and it rebounds to a height of 20 m. Find the
percentage loss of energy.
(1) 33V,% (2)
662/3%
(3) 50% (4)
50V,%
5. A body of mass
5 kg is thrown up vertically with a kinetic energy 500 J. Find the height at
which (KE) of the body becomes one fourth of the original KE. (Take
acceleration due to gravity (g) as 10 ms~2)
(1) 3.5m (2) 7.5m
(3) 5m (4)
10m
6. Rana moves with uniform velocity on
a bike. He throws a stone in air, the stone falls
(1) back
in his hands (2) in front of him
(3) at the
back of him (4) Cannot be predicted
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1. 2
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2. 3
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3. 3
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4. 1
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5. 2
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6. 1
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