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Online Tests
ECAT Pre General Science Physics Online Test MCQs With Answers
Question # 1
Eddy current is produced when:
Choose an answer
A metal is kept in varying magnetic field
A metal is kept in steady magnetic field
A circular coil is placed in a steady magnetic field
A current is passed through a circular coil
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Question # 2
A line which represents the direction of travel of a wave is known as:
Choose an answer
Spherical Wavefront
Locus
Ray
Either B or C
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Question # 3
An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)
Choose an answer
Q/4
π
r
2
2Q/4
π
r
2
Q.d
Zero
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Question # 4
The restoring force is always directed towards:
Choose an answer
Rest position
Equilibrium position
Mean position
All of them
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Question # 5
The SI unit of magnetic flux is
Choose an answer
NmA
-2
NmA
-1
NAm
-1
Nm
2
A
-1
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Question # 6
When the object lies between F and 2F, the image formed by is formed at:
Choose an answer
Real
Virtual
Diminished
Erect
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Question # 7
The fluid which is incompressible and non viscous is called
Choose an answer
Ideal fluid
Non-ideal fluid
Prefect fluid
All
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Question # 8
Distance traveled by a body falling from rest in the first, second and third second is in the ration of
Choose an answer
1 : 2 : 3
1 : 3 : 5
1 : 4 : 9
None of the above
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Question # 9
If two bodies of equal masses moving in the same direction collide elastically, then their velocities.
Choose an answer
Are added
Are subtracted
Do not change
Are exchanged
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Question # 10
The waves in which the particles of the medium have displacement along the direction of propagation of waves are called
Choose an answer
longitudinal waves
transverse waves
non-mechanical waves
none of them
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Question # 11
The graphical representation of ohm's law is
Choose an answer
hyperbola
straight line
ellipse
parabola
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Question # 12
The energy stored int he water of the dam is:
Choose an answer
Electric energy
Kinetic energy
Potential energy
None of these
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Question # 13
A person starts his journey from a point 0, travels 4 Km SW, then 4 Km NW, and finally 4 Km north-east. At what distance is he now from point 0?
Choose an answer
0 Km
4 Km
8 Km
12 Km
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Question # 14
If a vector lies in second quadrant, than B
x
and B
y
are:
Choose an answer
-,+
+,-
+,+
-,-
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Question # 15
The spectrum emitted from hydrogen filled discharge tube is:
Choose an answer
Line spectrum
Discrete spectrum
And spectrum
Absorption spectrum
Both (A) and (B)
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Question # 16
Max plank received the Nobel Prize in physics for his discovery of energy quanta in
Choose an answer
1900
1906
1912
1918
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Question # 17
One KWh is equal to:
Choose an answer
3.6 x 10
2
J
3.6 KJ
3.6 x 10
1
KJ
3.6 MJ
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Question # 18
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 # 19
dimensions are the same for:
Choose an answer
Work and energy
Force and weight
None of these
Both a and b
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Question # 20
A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/s
s
)
Choose an answer
9.8 m
14.7 m
4.9 m
19.6 m
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Question # 21
To hear a clear echo, the reflecting surface must be at a minimum distance of
Choose an answer
10 m
16.5 m
33 m
66 m
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Question # 22
Most OP-AMP operates with
Choose an answer
+
6 V supply
+
10 V supply
+
12 V supply
+
24 V supply
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Question # 23
In the above figures, tell which set is graphs shows that a body is moving uniform velocity:
Choose an answer
(i) and (ii)
(ii) and (iii)
(i) and (iii)
(ii) and (iv)
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Question # 24
Referring to above figure, due to change in current in the coil P, the change in magnetic flux
Choose an answer
Is associated with coil P
Is associated with coil S
Causes and induced current in coil S
All of these
None of these
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Question # 25
When a conductor moved with its length parallel to the lines of magnetic fled:
Choose an answer
An emf is induced across its ends
Emf induced is similar to that of a battery
Emf passes through the conductor
Both A and B
None of these
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Question # 26
Significant figures in 0.0010 are:
Choose an answer
Four
Three
Two
One
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Question # 27
Fluids can transmit:
Choose an answer
Transverse wave
Compressional wave
Both of them
None of them
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Question # 28
At high speed, fluid friction _____ and fuel consumption ___,:
Choose an answer
Increases, decreases
Increases, increases
Decreases, increases
None of these
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Question # 29
During the negative half-cycle of the half-wave rectification, the diode
Choose an answer
does not conduct
conducts
either of these
none of these
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Question # 30
In an adiabatic expansion, the temperature of the gas
Choose an answer
increases
becomes zero
decreases
decreases rapidly
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Question # 31
The CRO deflects the beam of electrons, when they passes through uniform
Choose an answer
electric field
gravitational field
magnetic flax
magnetic field
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