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Online Tests
Physics ECAT Pre Engineering Online Test MCQs With Answers
Question # 1
The valence band of an atom in a solid
Choose an answer
is always empty
may or may not be empty
can never be empty
none of them
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Question # 2
Work done on a body by gravity in lifting it up to certain height is
Choose an answer
Maximum
Minimum
Zero
Negative
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Question # 3
If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is
Choose an answer
F = B
2
F = 0
F = B
F = B/2
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Question # 4
In the text book, the transistor amplifier circuit is a:
Choose an answer
Common emitter circuit
Common collector circuit
Common base circuit
Any of these
None of these
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Question # 5
Lyman series in the spectrum of hydrogen exists in the :
Choose an answer
Infra-red region
Visible region
Ultraviolet region
Both(A) and (B)
None of these
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Question # 6
When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:
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0.5 J
2 J
0.25 J
1 J
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Question # 7
The second law gives the relationship between
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mass and velocity
force and acceleration
velocity and acceleration
mass and weight
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Question # 8
The charge per unit time through any cross-section of a conductor is called
Choose an answer
capacitance
electric power
current
potential difference
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Question # 9
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 # 10
If force and displacement are in opposite direction, the work done is taken as:
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Positive work
Negative work
Zero work
Infinte work
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Question # 11
Tick the correct answer:
Choose an answer
Torque is a vector quantity
Torque is the turning effect of a force
Torque is called moment of a force
All of above
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Question # 12
The results of mechanical tests are usually expressed in terms of
Choose an answer
stress
strain
stress and strain
neither strees nor strain
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Question # 13
Unit of viscosity is:
Choose an answer
Kg m
-1
sec
-1
N s m
-2
J s m
-3
All of these
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Question # 14
In bringing an electron towards another electron, electrostatic potential energy of system
Choose an answer
Decreases
Increases
Remains uncharged
Becomes zero
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Question # 15
An induced current can be produced by:
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Constant magnetic field
Changing magnetic field
Varying magnetic field
Constant electric field
None of these
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Question # 16
Lens's law deals with the
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Magnitude of induced current
Magnitude of induced e.m.f
Direction of induced e.m.f
Direction of induced current
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Question # 17
In the formula R = N x m for diffraction grating, N denotes:
Choose an answer
No. of lines/cm
No. of lines/meter
Total number of lines
None of above
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Question # 18
Internal friction of fluid is called
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Surface tension
Viscosity
Resistance
Cohesive force
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Question # 19
A capacitor of capacity 1
μ
F is charged to 1 KV. The energy stored in J
Choose an answer
5
0.5
0.005
50
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Question # 20
When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be
Choose an answer
180 watt
10 watt
20 watt
60 watt
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Question # 21
Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure
Choose an answer
A greater than than of B
A is equal to that of B
A is less than that of B
A is twice the pressure of B
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Question # 22
An aircraft is moving with a velocity of 300 ms
-1
. If all the forces acting on it are balanced, then
Choose an answer
It still moves with the same velocity
It will be just floating at the same point in space
It will be fall down instantaneously
It will lose its velocity gradually
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Question # 23
The idea of quantization of energy was proposed by:
Choose an answer
Einstein
Max.Planck
Maxwell
Bohr
Rutherford
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Question # 24
During each cycle, alternating voltage reaches a peak value
Choose an answer
One time
Two times
Four times
A number of times depending on the frequency
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Question # 25
The most common source of alternating voltage is:
Choose an answer
Motor
Transformer
AC genrator
Both (A) and (C)
Both (A) and (B)
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Question # 26
A charged particle moving at right angle to the magnetic field will experience
Choose an answer
minimum force
maximum force
zero
moderate force
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Question # 27
Two bodies of masses 1 kg and 5 kg are dropped gently form the top of a tower. A a point 20 cm from the ground both the bodies will have the same
Choose an answer
Momentum
Kinetic energy
Velocity
Total energy
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Question # 28
To convert galvanometer into ammeter we connect
Choose an answer
small resistance in parallel with galvanometer
small resistance in series with galvanometer
high resistance in series with galvanometer
high resistance in parallel with galvanometer
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Question # 29
The solids are classified as:
Choose an answer
Metals
Crystalline
Amorphous
Polymeric
All except (A)
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Question # 30
We can express the work in term of
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directly measurable variables
indirectly measurable variables
either of them
both of them
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Question # 31
The projectile motion is composed of
Choose an answer
horizontal motion only
vertical motion only
horizontal and vertical motion
none of them
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