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Online Tests
Physics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
Which quantity has different dimension:
Choose an answer
Work
Pressure
Energy
Torque
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Question # 2
The flow of an ideal fluid is
Choose an answer
streamline flow
incompressible flow
non-viscous
all of the above
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Question # 3
To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined
Choose an answer
Parallel
Antiparallel
At angle 60
°
Perpendicular to each other
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Question # 4
Stars twinkle due to
Choose an answer
The fact that they do not emit light continuously
The refractive index of earth's atmosphere fluctuates
The Star's atmosphere absorbs its light intermittently
None of these
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Question # 5
A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is
Choose an answer
17 m/s
33 m/s
17.5 m/s
none
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Question # 6
In a normal healthy person the value of diastolic pressure is
Choose an answer
75 - 80 torr
100 torr
120 torr
none of them
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Question # 7
The body oscillates due to _____ accelerates and overshoots the rest position due to______,:
Choose an answer
Applied force, inertial
Restoring force, friction
Frictional force, inertial
Restoring force, inertial
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Question # 8
The whole structure obtained by the repetition of unit cells is called:
Choose an answer
Crystal lattice
Amorphous solid
Polymeric solid
Polysterne
None of these
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Question # 9
Gamma rays consist of steam of
Choose an answer
electron
proton
photons
all of these
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Question # 10
The bicycle pump provides a good example of
Choose an answer
first law of thermodynamics
second law of thermodynamics
third law of thermodynamics
none of them
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Question # 11
In the force applied to parallel to the direction of motion, then the work done is:
Choose an answer
Positive
Negative
Zero
None of these
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Question # 12
The equation of continuity
A
1
V
1
= A
2
V
2
is for the flow of
Choose an answer
an ideal fluid
an incompressible fluid
a non visconcous fluid
all of the above
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Question # 13
The angle between centripetal force and displacement of the body moving in a circle is:
Choose an answer
0
°
90
°
180
°
None of these
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Question # 14
A change in position of a body from its initial position to its final position is known as
Choose an answer
relative motion
displacement
distance
acceleration
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Question # 15
Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
Choose an answer
3R
Ω
2R/4
Ω
R/3
Ω
2R/3
Ω
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Question # 16
If the vector 5 N lies along with x-axis, then its component along y-axis will be:
Choose an answer
Zero
5 N
7 N
10 N
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Question # 17
The path described by a projectile is called its
Choose an answer
orbit
trajectory
range
distance
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Question # 18
If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:
Choose an answer
Stationary waves
Transverse waves
Both of these
None of these
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Question # 19
The product of induced current and the resistance of the wire through which the current is passing is called:
Choose an answer
Electromagnetic induction
induced emf
Induced current
Self induced
None of these
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Question # 20
An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:
Choose an answer
100 m/sec
140 m/sec
1960 m/sec
196 m/sec
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Question # 21
Taking the earth to be a spherical conductor of diameter 12.8 x 10
3
km. Its capacity will be
Choose an answer
711
μ
F
611
μ
F
811
μ
F
511
μ
F
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Question # 22
The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150
°C to
Choose an answer
300
°C
573
°C
600
°C
743
°C
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Question # 23
Angular momentum
Choose an answer
Scalar
Axial vector
Polar vector
At 45
° angle
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Question # 24
0.10 cm can be written as:
Choose an answer
1.0 x 10
-2
m
1.0 x 10
-3
cm
1.0 x 10
-4
cm
1. x 10
-4
m
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Question # 25
The electric intensity at infinite distance from the point charge will be
Choose an answer
Infinite
Positive
Zero
Negative
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Question # 26
The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is
Choose an answer
100 J
1.6 x 10
-17
J
100 eV
1.6 x 10
-17
eV
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Question # 27
The time taken by light to travel from moon to earth is:
Choose an answer
80 sec
500 sec
1.802 X 10
4
sec
Aerophysics
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Question # 28
Electric field strength is defined as
Choose an answer
Work done on unit charge
Force exerted on unit charge
Distance covered by unit charge
Power exerted by unit charge
None of these
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Question # 29
We can excite an atom by
Choose an answer
Bombardment of particles
Radiating photons
Providing potential difference
All answer are true
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Question # 30
β-particles are easily deflected by collisions than heavy
Choose an answer
α-particles
β-particles
γ-particles
none of these
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Question # 31
When a nucleus emits an alpha particles, its charge number decreases by
Choose an answer
3
2
6
5
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