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MDCAT Physics Online Test MCQs With Answers
Question # 1
A digital multimeter is preferred over ordinary AVO meter because
Choose an answer
No needle is used
Error free reading
No battery is used
None of these
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Question # 2
The doped semi-conductors materials are known as
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intrinsic semi-conductor
extrinsic semi-conductor
either of them
none of them
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Question # 3
In GM counter the potential difference applied between anode and cathode is
Choose an answer
Slightly greater than that required to produce discharge
Slightly less than that required to produce discharge
Equal to that required to produced discharge
Much greater than required to produce discharge
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Question # 4
The number of significant figures in all the given number 25.12.2009,4.156 and 1.257 x 10
-4
is
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1
2
3
4
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Question # 5
A proton is assumed to be made up of quarks
Choose an answer
Two up one down
Two down one up
Two up two down
None of these
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Question # 6
The magnetic field in the middle of a solenoid due to current is
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weak
strong and uniform
none-uniform
zero
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Question # 7
For a moving body. at any instant of time
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If the body is not moving the acceleration is necessarily zero
If the body is slowing.the retardation is negative
If the body is slowing.the distance is negative
If displacement.velocity and acceleration at that instant are known,we can find the displacement at any given time in future.
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Question # 8
Speed of sound is air at 20°C is
Choose an answer
307 ms
-1
315 ms
-1
332 ms
-1
300 ms
-1
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Question # 9
The relative permitivity ∈
r
for transformer oil is
Choose an answer
2.9
3.0
2.1
2.4
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Question # 10
The path described by a projectile is called its
Choose an answer
orbit
trajectory
range
distance
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Question # 11
Photocell is a device which converts
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chemical energy into electrical energy
electrical energy into light energy
heat energy into electrical energy
light energy into electrical energy
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Question # 12
A photon is always considered to be
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At rest
Moving with speed of light
In accelerated form
None of these
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Question # 13
The velocity of a body at some particular instant is called
Choose an answer
Initial velocity
Instantaneous velocity
Variable velocity
None of these
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Question # 14
The cars usually have cylinders on the crankshaft are
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2
3
4
6
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Question # 15
In forward bias the depletion region behaves like
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An insulator
A conductor
A semi-conductor
All of the above
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Question # 16
The K.E.of a light and a heavy object is same.Which object has maximum momentum?
Choose an answer
Light object
Heavy object
Both have the same momentum
Data is not sufficient
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Question # 17
The waves which propagate through the oscillations of material particles are known as:
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Mechanical waves
Electromagnetic waves
Any of them
None of them
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Question # 18
There are earth stations which transmit signals to satellites and receive signals via satellite from other countries are
Choose an answer
200
Over 200
400
500
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Question # 19
Surface tension of water is due to
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Inter molecular attractions
Intermolecular spaces
Inter molecular repulsion
None of above
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Question # 20
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 # 21
When the torque acting on a system is zero, which of the following will be constant
Choose an answer
linear momentum
angular momentum
impulse
force
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Question # 22
The temperature at which the speed of sound becomes double is
Choose an answer
373
°C
658
°C
1132
°C
859
°C
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Question # 23
Energy is stored in the choke coil in the form of
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Heat
Magnetic energy
Electric energy
Electro-magnetic energy
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Question # 24
The approximate efficiency of silicon solar cell is
Choose an answer
5 - 10%
9 - 12%
12 - 16%
15 - 18%
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Question # 25
The quality of the moving body is called
Choose an answer
Motion
Momentum
Force
None of these
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Question # 26
For all the irreversible processes the entropy of the system
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Increases
Decreases
Remains constant
None of these
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Question # 27
In nodes, the energy does
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Not remain
Remain upper end
Lower end
Alternate between P.E. and K.E.
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Question # 28
The reactance of coil depends upon the
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Frequency of D.C. and inductance L
Frequency of A.C. and inductance L
Frequency of D.C. and current I
None of these
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Question # 29
Area between the velocity time graph and time axis is equal to
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Speed of object
Distance covered
Velocity of the object
Acceleration
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Question # 30
The internal energy of a mono-atomic ideal gas molecule is
Choose an answer
Partly kinetic and partly potential
Totally kinetic
Totally potential
Neither kinetic nor potential
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Question # 31
One gray is equal to
Choose an answer
1 N kg
-1
1 dyne kg
-1
1 J kg
-1
None of these
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Question # 32
An α-particle enters a magnetic field of 1 tesla with a velocity 10
6
m/s in a direction perpendicular to the field.The force on α-particle is
Choose an answer
1.6 x 10
-13
N
6.4 x 10
-13
N
4.8 x 10
-13
N
3.2 x 10
-13
N
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Question # 33
The A.M waves frequency range lies
Choose an answer
540 Hz to 1600 Hz
540 K Hz to 1600KHz
540 Hz to 1600 KHz
None
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Question # 34
A resistor is connected in order to convert galvanometer into ammeter
Choose an answer
Very high resistor
High resistor
Lower resistor
Very low resistor
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Question # 35
The rate of change of angular velocity is called
Choose an answer
Angular displacement
Angular acceleration
Instantaneous velocity
None of these
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Question # 36
The velocity of sound at same temperature is maximum in
Choose an answer
H
2
N
2
O
2
NH
3
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Question # 37
In case of destructive interference of two waves, the amplitude of the resultant wave will be_______either of the waves:
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Greater than
Smaller than
Equal to
none of these
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Question # 38
When K.E
max
of the photoelectron is zero then the frequency f is the equal to
Choose an answer
Minimum frequency
Maximum frequency
Threshold frequency
None of these
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Question # 39
The perpendicular distance form the line of action of force to the pivot point is called
Choose an answer
couple arm
angular distance
moment arm
none of them
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Question # 40
Identify the incorrect statement
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The distance between the objective and eye-piece is 16.02 cm
The angular magnification of the planet is 800
The image of the planet is inverted
The objective is larger than the eye-piece
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