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Online Tests
Physics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
Choose an answer
voltmeters
resistance
electrode
current
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Question # 2
The nature of radiations emitted by a hot body depends upon its:
Choose an answer
Metarial
Temperature
colour
Volume
Length
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Question # 3
An electron of the hydrogen atom in the second orbit is called its:
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Ground state
Excited state
Ionized state
Any of these
None of these
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Question # 4
The vast majority of solids are in the form of
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amorphous structure
polymeric structure
crystalline structure
all of them
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Question # 5
The force acting on a charge moving in a magnetic field
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is perpendicular to the both magnetic field and direction of motion
is proportional to the magnetic of charges
vanishes when the motion is directly opposite to the direction of field
all of the above
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Question # 6
The force applied on unit area to produce any change in the shape, volume or length of a body is known as
Choose an answer
strain
elasticity
stretching
stress
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Question # 7
Blood pressure is measured by the instrument
Choose an answer
stethoscope
sphygmomanometer
barometer
none of them
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Question # 8
The rate of change of momentum of a molecule is equal to:
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Pressure
Work
Density
Force
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Question # 9
When a body moves to and fro motion, this type of motion is called
Choose an answer
translatory motion
circular motion
oscillatory motion
all of them
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Question # 10
The blood pressure of a person
Choose an answer
decrease with age
increase with age
has no effect with age
none of them
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Question # 11
The total energy of spring mass system is
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zero
changing with time
constant
none of them
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Question # 12
In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
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photo diode
light emitting diode
photo voltaic cell
all of them
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Question # 13
A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:
Choose an answer
Longitudinal wave
Transverse wave
No vibration at all
None of them
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Question # 14
The magnetic field inside a solenoid can be increased by:
Choose an answer
Increasing n
Decreasing I
Increasing I
By using iron core within solenoid
All correct except (B)
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Question # 15
When the total displacement is divided by total time taken, we get:
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Velocity
Average speed
Average velocity
None of these
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Question # 16
Which of the following is an example of a S.H.M?
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motion of a projectile
motion of a train along a circular path
motion of swing
electrons revolving sound the nucleus
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Question # 17
The phase at the positive peak is
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Π/2
Π
3
Π/2
2
Π
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Question # 18
The concept of entropy was introduced into the study of thermodynamics in
Choose an answer
1856
1865
1656
1685
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Question # 19
If the distance between two charges is doubled, the force between them will become:
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Double
Half
Three times
One fourth
One third
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Question # 20
When brakes are applied to a fast moving car, the passengers will be thrown:
Choose an answer
Forward
Backward
Downward
None of these
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Question # 21
Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at
Choose an answer
125 K
25 K
263 K
163 K
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Question # 22
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 # 23
The flow of an ideal fluid is
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streamline flow
incompressible flow
non-viscous
all of the above
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Question # 24
For multiplication and division purposes, percentage uncertainties are:
Choose an answer
Add
subtracted
Multiplied
Divided
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Question # 25
A dimension stands for the ___________ nature of certain physical quantity.
Choose an answer
super
Quantitative
Qualitative
Both B and C
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Question # 26
Pair production take place when energy of
γ-rays photon is
Choose an answer
equal to 1.02 Mev-
greater than 1.02 Mev
less than 1.02 Mev
none of these
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Question # 27
The magnitude of the resultant of two forces may be increased by:
Choose an answer
Increasing the angle between them
Decreasing the angle between them
Drawing a triangle to represent them
None of these
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Question # 28
The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by
Choose an answer
F =q(v/B)
F=q
2
(v x B)
F=q(v x B)
F= vx B
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Question # 29
The branch of physics which deals with the properties of fundamental particles is called:
Choose an answer
High energy physics
Molecular physics
Astrophysics
Space physics
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Question # 30
Pressure exerted by a gas is
Choose an answer
Independent of density of the gas
Inversely proportional to the density of the gas
Directly proportional to the square of the density of the gas
Directly proportional to the density of the gas
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Question # 31
A digital system deals with quantities which has discrete values:
Choose an answer
Two in number
One in number
Three in number
Four in number
None of these
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