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MDCAT Physics Online Test MCQs With Answers
Question # 1
If S is the stress and Y is Young's modulus of the material of a wire, the energy stored in the wire per unit volume is
Choose an answer
2 S
2
Y
S
2
/2Y
2Y/S
2
S/2Y
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Question # 2
The unit of intensity level of sound is
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watt
joule
bel
sabin
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Question # 3
The mks unit of Mechanical Equivalent of heat is
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Joulex calorie
Joule/ calorie
Calorie x erg
erg/ calorie
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Question # 4
The process of scattering of an x-ray photon by an electron is called
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Compton Effect
Photoelectric Effect
Pair Production
Annihilation
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Question # 5
In the stress-strain graph stress is increased linearly with strain until a point is reached this point is known as
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Plastic limit
Plastic deformation
Proportional limit
Elastic behaviour
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Question # 6
The approximate efficiency of silicon solar cell is
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5 - 10 %
9 - 12 %
12 - 16 %
15 - 18 %
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Question # 7
The terminal velocity of falling object will be proportional to
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r
2
1/r
2
r
1/r
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Question # 8
An optical fibre with its protective case may be typically 6.0 mm in diameter and yet it can replace bundle of copper of diameter
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6.79 cm
6.95 cm
7.52 cm
7.62 cm
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Question # 9
1 joule is equal to electrons volt
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1.6 x 10
-19
1.6 x 10
19
6.25 x 10
19
6.25 x 10
18
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Question # 10
A capacitor of 2μF is connected with a battery of 12 volts the charge stored is
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2.5 × 10
-5
C
2.4 × 10
-6
C
2.4 × 10
-5
C
2.4 × 10
-6
C
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Question # 11
The ratio of stress/strain is called as
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Modulus of elasticity
Bulk modulus
Shear modulus
Young's modulus
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Question # 12
In LCR circuit which one of the following statements is correct?
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L and R oppose each other
R value increase with frequency
The inductive reactance increases with frequency
The capacitive reactance increases with frequency
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Question # 13
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Work
Pressure
Momentum
Power
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Question # 14
Pressure of a gas at constant volume is proportion to
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Total energy of gas
Average P.E of molecules
Average K.E of molecules
Total internal energy of gas
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Question # 15
A spectrometer is used to find
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Wavelength of light
Refractive index of the prism
Angle of minimum deviation of prism
All of these
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Question # 16
Base quantities are
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Scalars
Vectors
Both
None of these
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Question # 17
Swinging pendulum eventually stop because of its energy is
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Destroyed
Converted into K.E
Converted into P.E
Converted into heat energy
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Question # 18
A piece of wire along which charges are made to accelerate is known as
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Transmitting antenna
Receiving antenna
Modulator
Nor of these
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Question # 19
The value of current gain of n-p-n transistor is of the order of
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tens
hundreds
thousands
ten thousands
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Question # 20
There will be no change in _______ of light entering glass
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Velocity
Frequency
Direction
Wavelength
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Question # 21
If a magnet is broken into two pieces, then
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Two magnets are obtained
North pole is obtained
South pole is obtained
One North Pole and one South Pole is obtained
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Question # 22
A body falling freely under the action of gravity has
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Constant weight
Variable weigth
Maximum weigth
No weigth
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Question # 23
When a semiconductor is continuously heated then value of its resistance
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Increases
Decreases
Decreases and then increases
Remains unchanged
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Question # 24
Geometrical optics cannot give following characteristics for a microscope
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Image position
Image size
Resolution of image
Any of the above
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Question # 25
Two sources of sound are said to be coherent if
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They produce sounds of equal intensity
They produce sounds of equal frequency
They produce sound waves vibrating with the same phase
They produce sound waves with zero or constant phase difference all instant of time
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Question # 26
The approximate efficiency of liquid fuel rocket is
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49%
50%
48%
47%
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Question # 27
The Earth's potential is considered to be at
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Zero
Minimum
Maximum
Infinite
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Question # 28
The resistivity decrease with the increase of temperature of
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Gold
Silver
Copper
Silicon
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Question # 29
The safe equivalent dose for workers for a week in the nuclear facilities or mines is
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3 m SV
1 m SV
0.5 m SV
None of these
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Question # 30
In multimode graded index fibre core and cladding has boundary
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Noticeable
No noticeable
No boundary
None of these
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Question # 31
The terms phase difference and path difference are:
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Same
Different
Equal
None of these
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Question # 32
The waves which propagate by the oscillation of material particles are known as
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Water waves
Electromagnetic waves
Mechanical waves
None of these
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Question # 33
A charge particle when projected perpendicular to the direction of the field experience a
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Minimum force
Maximum force
No force
None of these
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Question # 34
The ratio of fringes with for bright and dark fringes is
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1 : 2
2 : 1
1 : 4
1 : 1
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Question # 35
As a wave progressive, each point in the medium oscillates with the
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smaller frequency and same period of the source
same frequency and smaller period of the source
same frequency and period of the source
all of them
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Question # 36
Which particle has the greatest relative biological?
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neutron
β-particle
α-particle
X-ray
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Question # 37
In physics, the term "work" involves the
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force only
displacement only
force as well as displacement
none of them
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Question # 38
The impedance of the series circuit at resonance frequency is
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Minimum
Maximum
Zero
1
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Question # 39
The smallest portion of a crystal lattice that if repeated in three-dimensions will generate the entire lattice is called:
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Unit cell
Lattice plane
Crystal
None of these
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Question # 40
When heat is added to the system, the entropy change is:
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Positive
Negative
Zero
None of these
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Question # 41
The speed of light in vacuum or in air is
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3 x 10
10
m ! s
3 x 10
9
m ! s
3 x 10
8
m ! s
3 x 10
7
m ! s
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