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MDCAT Physics Online Test MCQs With Answers
Question # 1
Which of the following properties show light is transverse wave in nature?
Choose an answer
Interference
Reflection
Diffraction
Polarization
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Question # 2
A 200 volt, 1000 W bulb is connected across a 1100 volt main supply.The power consumed will be
Choose an answer
1000 W
750 W
500 W
250 W
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Question # 3
"Load" is are the device/devices which consume
Choose an answer
Mechanical energy
Electrical energy
Frictional energy
None of these
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Question # 4
Conditions for interference are that the two sources should be coherent and
Choose an answer
At a far off distance
Close together
Coinciding
None of these
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Question # 5
In d.C. motor, the field coils with the armature coils are connected
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In parallel
In series
Both
None of these
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Question # 6
The work function of photoelectric substance is 3.3 eV,The Value of threshold frequency will be
Choose an answer
8 x 10
14
Hertz
5 x 10
33
Hertz
8 x 10
10
Hertz
4 x 10
11
Hertz
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Question # 7
The phenomenon of electromagnetic induction in which induced
Choose an answer
Current produced
emf produced
Current and emf produced
None of these
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Question # 8
When brakes are applied to a fast moving car, the passengers will be thrown:
Choose an answer
Forward
Backward
Downward
None of these
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Question # 9
In a standing wave the distance between two adjacent nodes is equal to
Choose an answer
λ
/2
λ
3
λ
/2
λ
/4
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Question # 10
The magnitude of motional emf is given by:
Choose an answer
ε = -VBL
ε = VBL
ε = v/BL
ε = - L/VB
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Question # 11
The maximum height attained by the projectile is
Choose an answer
V
1
2
/g sin
2
θ
V
1
2
/2g sin2θ
V
1
2
/2g sin
2
θ
None
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Question # 12
A driver in a lake wants to signal his distress to a person sitting on the edge of the lake flashing his water proof torch He should direct the beam
Choose an answer
Vertically up wards
Horizontally
At angle to the vertical which is slightly less than the critical angle
At an angle to the vertical which is slightly more than critical angle
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Question # 13
A common point between OR and AND gates is that
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Their outputs may be 1 even when either of their inputs is at 2
Their outputs are 5 when their all inputs are at 6
Their outputs may be 1 even when either of their inputs is 3
None of these
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Question # 14
The relative permitivity for vacuum is
Choose an answer
1
2
1.002
1.004
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Question # 15
The energy of a photon is represented by
Choose an answer
h/c
2
h/T
hc
2
hf/c
2
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Question # 16
Which of the given pair have same dimension
Choose an answer
Stress, pressure
Elastic modules, pressure
Stress, elastic modules
All have same dimension
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Question # 17
The least distance of distinct vision for a normal eye is
Choose an answer
15 cm
25 cm
35 cm
1 m
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Question # 18
A capacitor is a perfect insulator for electric
Choose an answer
Direct current
Alternating current
Charge
None of these
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Question # 19
Domains are present only in
Choose an answer
Diamagnetic material
Para magnetic material
Ferromagnetic material
All of these
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Question # 20
If the object of different masses move with the same velocity, then it is more difficult to stop the
Choose an answer
lighter of the two
massive of the two
any one of them
both of them
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Question # 21
An astronaut carries with him a cylinder of capacity 10 litre filled with nitrogen gas at temperature 27°C and pressure 50 atmosphere He makes hole of area 1 cm
2
in it.In how much time will it be emitted
Choose an answer
755 s
1.132 s
0.153 s
0.387 s
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Question # 22
When water is heated from 0C
°
to 10C
°
its volume
Choose an answer
Increases
Decreases
Does not change
First decreases and then increases
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Question # 23
Maximum dose allowed to general public from artificial sources for year
Choose an answer
500 m Sv
1000 m Sv
1500 m Sv
2000 m Sv
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Question # 24
Gauss s law is applicable by considering Gaussian surface The Gaussian surface must has shape which is
Choose an answer
Spherical
Cylindrical
Box type
Any arbitrary closed shape
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Question # 25
The electrons are emitted from the metal when light falls on it is of
Choose an answer
High frequency
Low frequency
Suitable frequency
None of these
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Question # 26
The ballistic missiles are useful only for
Choose an answer
long ranges
short ranges
medium ranges
none of them
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Question # 27
Alternatively increasing and decreasing intensity will be heard when two tuning fork are sounded together is called
Choose an answer
Interference
Beats
Stationary waves
None of these
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Question # 28
The velocity of photon is
Choose an answer
3 x 10
8
ms
-1
3 x 10
8
cms
-1
3 x 10
8
cms
-2
3 x 10
8
cms
-2
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Question # 29
The viscosity of liquid is due to
Choose an answer
Adhesive force
Cohesive force
Gravitational force
Diffusion
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Question # 30
Successive dark and bright fringes are formed each time the moveable mirror in Michelsion's interferometer is moved a distance
Choose an answer
λ/2
λ/4
λ
3/2
λ
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Question # 31
If on increasing temperature the resistance decreases,then it is
Choose an answer
Superconductor
Semiconductor
Insulator
None of the above
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Question # 32
When a stretched string of length 'I' is plucked form one quarter of its length, the string will vibrate in
Choose an answer
one loop
two loops
three loops
four loops
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Question # 33
Which of the following substances possesses the highest elasticity?
Choose an answer
Al
Copper
Steel
Rubber
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Question # 34
The potential difference across the depletion region of silicon is
Choose an answer
0.5 V
0.67 V
0.7 V
0.8 V
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Question # 35
In a compressional wave, the particles of the medium in the path of the wave move
Choose an answer
perpendicular to the direction of propagation of wave
opposite to the direction of propagation of wave
along the direction of propagation of wave
any one of them
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Question # 36
In the self-cross product the angle is
Choose an answer
0°
45°
90°
180°
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Question # 37
Newton calculated the velocity of sound in air at S. T. P equal to
Choose an answer
250 ms
-1
280 ms
-1
300 ms
-1
322 ms
-1
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Question # 38
Defective cells are generated due to
Choose an answer
Complete destruction of cells
Half destruction of cells
Damaged by radiation but service
None of these
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Question # 39
The terminal velocity of a small size spherical body of radius R moving in a fluid varies as
Choose an answer
R
R
2
1/R
(1/R)
2
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Question # 40
When the length of a microscope tube increases its magnifying power
Choose an answer
Decreases
Increases
Does not change
May increase or decrease depending on the observer and the place of observation
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Question # 41
In place of spark plug, the diesel engine requires also
Choose an answer
High speed air
High temperature air
Low temperature air
None of these
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