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MDCAT Physics Online Test MCQs With Answers
Question # 1
The force experienced is F = BIL, when a current carrying conductor carrying current I with length 'L' is placed in a magnetic field, will be at
Choose an answer
θ = 0
θ = 90
°
θ = 60
°
θ = 180
°
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Question # 2
When the source is moving away from the observer at rest the apparent frequency will be
Choose an answer
Increased
Decreased
Not changed
None of these
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Question # 3
The working of a dynamo is based on the principle of:
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Heating effect of current
Magnetic effect of current
Chemical effect of current
electromagnetic induction
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Question # 4
Fahrenheit and centigrade (Celsius) thermometers have the same reading at
Choose an answer
-100°C
60°C
40°C
-40°C
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Question # 5
The bands below the valence band are
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completely filled and play active part in conduction process
completely filled and plays no part in conduction process
not completely filled and play active part in conduction process
not completely filled and play no part in conduction process
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Question # 6
The value of the plank's constant 'h' is given by
Choose an answer
1.6 x 10
-19
J
1.67 x 10
-27
kg
6.63 x 10
34
Js
6.63 x 10
-34
Js
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Question # 7
The value of '
γ
'
for polyatomic gas is
Choose an answer
1.40
1.67
1.17
1.29
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Question # 8
Fission chain reaction is controlled by introducing
Choose an answer
iron rods
cadmium rods
graphite rods
platinum rods
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Question # 9
The drift velocity of free electrons in a metallic conductor is
Choose an answer
10
-3
ms
-1
10
-4
ms
-1
10
-5
ms
-1
10
-6
ms
-1
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Question # 10
CRO deflects the beam of
Choose an answer
protons
alpha particles
electrons
neutrons
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Question # 11
Two parallel wires carrying current in opposite direction
Choose an answer
Repel each ohter
Attract each other
No effect on each other
None of these
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Question # 12
Which of these is not a radiation detector?
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Wilson cloud chamber
cyclotron accelerator
Geiger Miller counter
solid state detector
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Question # 13
The substances in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero, are called
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diamagnetic substances
ferromagnetic substances
paramagnetic substances
all of them
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Question # 14
In Compton effect, the law/laws are conserved
Choose an answer
Energy
Momentum
Both
None of these
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Question # 15
A prism splits a beam of white light into seven component colors. This is so because
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Phase of different colors is different
Amplitude of different colors is different
Energy of different colors is different
Velocity of different colors is different
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Question # 16
Davisson and Germen were the first to demonstrate
Choose an answer
The straight line propagation of light
The diffraction of electrons
The effective mass of electron
The particle nature property
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Question # 17
When a stress changes the volume, it is called the
Choose an answer
compressional stress
tensile stress
shear stress
any one of them
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Question # 18
Which of them is not a physical quantity
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Density
Impulse
Energy
Kilogram
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Question # 19
A person moves 30m north then 20m east then 30√2 m south west His displacement from the original position is
Choose an answer
14 m south west
28 m south
10 m west
15 m east
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Question # 20
If the mass of earth becomes four times to its initial value than the value of g will be
Choose an answer
Does not change
Becomes four time
Become one fourth of its initial value
None of these
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Question # 21
Typical source of β-particle is
Choose an answer
Radon 222
Cobalt 62
Strontium 94
None of these
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Question # 22
In conductors, the valence band and conduction bands are
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Touch each other
Overlapped each other
Largely overlapped
None of these
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Question # 23
Neutron was suggested to be in the nucleus by:
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Rutherford in 1920
Bohr in 1913
Dirac in 1928
Anderson in 1932
None of these
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Question # 24
Two bodies of 4 g and 16 g have same kinetic energy.What is the ratio of their momenta?
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1 : 4
1 : 2
2 : 1
4 : 1
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Question # 25
The penetrating power of X rays increases with
Choose an answer
Decrease in velocity
Increase in velocity
Increase in frequency
Decrease in their intensity
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Question # 26
Frequency of red colour as compared to that of violet colour is:
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Equal
Smaller
Greater
None of these
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Question # 27
The gas filled in a glass tube in e/m experiment is hydrogen at
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Low pressure
Very low pressure
High pressure
None of these
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Question # 28
γ-ray emission from the nucleus of an atom causes a
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change in A
Change in Z only
change in both A and Z
no change in A and Z
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Question # 29
Double of Compton s wavelength equal to
Choose an answer
Maximum value if Compton shift
Minimum value of Compton shift
Maximum value of Doppler s shift
Minimum value of Doppler s shift
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Question # 30
In diesel engine no sparking device and no need of
Choose an answer
Heavy current unit
Spark plug
Instant starting
None of these
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Question # 31
The speed of flying bee is
Choose an answer
1 ms
-1
5 ms
-1
8 ms
-1
10 ms
-1
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Question # 32
The energy gap between conduction band and valence band is semiconductor is
Choose an answer
A very narrow forbidden energy gap
A narrow forbidden gap
Of the order of 1 eV
a and b
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Question # 33
The ratio of size of the image to the size of the object is called
Choose an answer
Resolving power
Magnification
Power
None of these
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Question # 34
The moon produces the tides raise the water in the sea roughly
Choose an answer
Once a day
Twice a day
Several a day
None of these
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Question # 35
Even the small viscosity of the air causes a retarding force on car at high speed is
Choose an answer
Small
Large
Very large
None of these
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Question # 36
Can a body rotate about its centre of gravity under the action of its weight ?
Choose an answer
No
yes
Both
None of these
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Question # 37
The direction of induced current is such that it opposes the very cause that has produced it.This is the law of
Choose an answer
Lenz
Faraday
Kirchoff
Fleming
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Question # 38
A switch which is used in voltage measuring part of AVO meter, is called
Choose an answer
selection switch
function switch
range switch
none of them
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Question # 39
Torque is a turning effect of a
Choose an answer
Body
Momentum
Force
None of these
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Question # 40
Associated with the motion of a driven harmonic oscillator there is a very striking phenomenon known as
Choose an answer
Demping
Resonance
Interference
None of these
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Question # 41
Correction factor can be applied to
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Personal error
Systematic error
Random error
All
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