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ECAT Physics Online Test MCQs With Answers
Question # 1
An emf is set up in a conductor when it:
Choose an answer
Is kept in a magnetic field
Is kept in an electric field
Moves across a magnetic field
Both A and B
None of these
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Question # 2
Longitudinal waves are also called:
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Congressional waves
Transverse waves
Radio waves
None of them
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Question # 3
In magnet-coil experiment, emf can be produced by:
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Keeping the coil stationary and moving the magnet
Keeping the magnet stationary and moving the coil
Relative motion of the loop and magnet
Any one of above
All above
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Question # 4
The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called
Choose an answer
Mutual induction
Mutual inductance
Capacitance
Self inductance
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Question # 5
Range of a projectile is R, when the angle of projection is 30
° . Then, the value of the other angle of projection for the same range, is
Choose an answer
45
°
60
°
50
°
40
°
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Question # 6
Which of the following diodes can operate in the reverse biased condition
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photo diode
light emitting diode
photo voltaic cell
none of these
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Question # 7
Which one of the following is dimensionless:
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Acceleration
Velocity
Density
Angle
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Question # 8
When a bicycle is in motion, the frictional forces exerted by the ground are
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In the forward direction on both the wheels
In the backward direction on both the wheels
In the forward direction on the front wheel and the backward direction on the rear wheel
In the backward direction on the front wheel and the forward direction on the rear wheel
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Question # 9
In the expression F x t, the force F is
Choose an answer
total force
instantaneous force
average force
all of them
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Question # 10
In describing functions of digital systems, a closed switch will be shown as
Choose an answer
0
1
low
any one of these
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Question # 11
During the steady flow, different streamlines
Choose an answer
cannot across each other
can across each other
either of them
neither of them
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Question # 12
The total charge of any nucleus is given as
Choose an answer
Ze
2
Z
2
e
Z/e
Ze
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Question # 13
A typical rocket ejects the burnt gases at speeds over
Choose an answer
400 ms
-1
40000m s
-1
40000 ms
-1
60000 ms
-1
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Question # 14
A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:
Choose an answer
0.5 m/sec2
5 m/sec2
1.5 m/sec2
9.8 m/sec2
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Question # 15
In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric strain is called
Choose an answer
Young's modulus
Bulk modulus
Shear modulus
all of them
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Question # 16
A current of 1.6 A is passed through a solution of CuSO
4. How many Cu
2+
ions are liberated in one minute?
Choose an answer
3 x 10
20
3 x 10
10
6 x 10
20
6 x 10
10
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Question # 17
The emf is measured in:
Choose an answer
Newton
Volt
J/C
Both A and B
Both B and C
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Question # 18
In an A.C circuit with resistor only, the current and voltage have a phase angle of
Choose an answer
90
°
0
°
180
°
none of these
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Question # 19
Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
Choose an answer
deuterium
protium
tritium
none of these
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Question # 20
The horizontal range of projectile, at a certain place, depends upon
Choose an answer
the mass of the projectile
velocity of projection
angle of projection
angle as well as velocity of projection
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Question # 21
In case of metallic conductors, the charge carriers are
Choose an answer
Protons
Electrons
Antiprotons
Positrons
Both A and B
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Question # 22
The field around a moving charge is called
Choose an answer
magnetic field
conservative field
non-conservative field
none of these
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Question # 23
Surface density of charge is defined as
Choose an answer
Charge per unit volume
Charge per unit length
Charge per unit area
Charge per unit mass
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Question # 24
The crystalline structure of NaCI is
Choose an answer
rectangular
hexagonal
tetrahedral
cubical
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Question # 25
If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
Choose an answer
6 ohm
4 ohm
zero ohm
1.33 ohm
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Question # 26
Battery is charged in motor cars, which is based on
Choose an answer
Chemical effect
Magnetic effect
Electric effect
None
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Question # 27
Structure of the nucleus was explained by
Choose an answer
J.J Thomson
Bohr
Millikan
Rutherford
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Question # 28
The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called
Choose an answer
magnetic flux
magnetic flux density
magnetic induction
magnetic field intensity
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Question # 29
When body moves with increasing acceleration, its velocity time graph is a
Choose an answer
straight line
horizontal straight line
vertical straight line
curve
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Question # 30
An object undergoes S.H.M has maximum speed when its displacement from the mean position is
Choose an answer
maximum
zero
half of the maximum value
one third of the maximum value
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Question # 31
The way through which electromagnetic radiations or photons interact with matter depends upon their:
Choose an answer
Wavelength
Frequency
Energy
Temperature
All of these
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