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MDCAT Physics Online Test MCQs With Answers
Question # 1
If red light is incident on sea water it appears
Choose an answer
Red
Green
Blue
Yellow
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Question # 2
The magnetic lines of force like electric lines of force
Choose an answer
Are closed
Are not closed
Are open
Are not open
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Question # 3
The nature of radiations emitted by a hot body depend upon its:
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Meterial
Temperatutre
Colour
Volume
Length
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Question # 4
The optical fibre is covered for protection with
Choose an answer
rubber jacket
plastic jacket
steel jacket
copper jacket
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Question # 5
According o Einsteins theory space time is
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Just coordinates
A straight line
Curved
None of these
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Question # 6
A heat engine converts thermal energy to mechanical work which is
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All
Partly
Some
None of these
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Question # 7
The discharge tube of the - Ne laser is filled with
Choose an answer
He 80 % ; Ne 20 %
He 85; Ne 15 %
He 90 %; Ne 10 %
None of these
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Question # 8
In sound waves during compression
Choose an answer
Density medium is maximum
Pressure of medium is maximum
Density of medium is minimum
Both A and B
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Question # 9
The speed of sound
Choose an answer
Increases with the increase of the gas pressure
is not affected with the change in the gas pressure
decreases with the increase of the gas pressure
none of them
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Question # 10
Electrons are
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positively charged
negatively charged
masslesss
neutral
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Question # 11
The crest is a pattern in which the rope is displaced
Choose an answer
Below its equilibrium position
Above its equilibrium position
Above and below its equilibrium position
None of these
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Question # 12
Consider the following statement about dimensions
P: Force = Acceleration due to gravity x Mass
Q: Electric charge = Current x Time
R: Magnetic flux = Electric voltage x Time
The correct statements are:
Choose an answer
R, P only
P, Q only
Q, R only
P, Q and R
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Question # 13
Energy can be stored in
Choose an answer
Magnetic field of a capacitor
Electric field of a capacitor
Dielectric
None of these
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Question # 14
The mechanical waves are generated by
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In ropes
Coil of springs
Water waves
All of these
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Question # 15
In a straight current-carrying conductor, the direction of magnetic field can be found by
Choose an answer
right hand rule
left hand rule
head to tall rule
none of them
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Question # 16
Indirectly heated cathode means:
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Cathode heats the filament
Grid heats the filament
Filament heats the cathode
Both A & B
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Question # 17
A thermister is a
Choose an answer
Heat temperature resistor
Current sensitive resistor
Voltage sensitive resistor
None of these
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Question # 18
In inductive circuit V leads I by
Choose an answer
π
π
/2
2
π
In phase
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Question # 19
A body of mass 3 kg lies on the surface of the table 2 m high It is moved on the surface by 4 m The change of P.E will be
Choose an answer
Zero
9.8 j
19.6 j
329 j
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Question # 20
The current through a metallic conductor is due to the motion of:
Choose an answer
Electrons
Protons
Neutrons
Free electrons
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Question # 21
A bar magnet is equivalent to
Choose an answer
Toroid carrying current
Straight conductor carrying current
Solenoid carrying current
Circular coil carrying current
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Question # 22
The ionizing ability of β-particles is less then the α-particle about
Choose an answer
100 times less
150 times less
200 times less
None of these
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Question # 23
Turn table is the plateform over which we place
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Diffraction grating
Prism
Glass slab
a and b
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Question # 24
Calculate entropy change when 1.0 Kg ice at 0
o
C melts into water at 0
o
C. Latent heat of fusion of ice L
f
= 3.36 × 10
5
J Kg
-1
Choose an answer
1.18 × 10
2
JK
-1
1.20 × 10
4
J Kg
-1
1.23 × 10
3
JK
-1
1.23 × 10
4
J Kg
-1
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Question # 25
Solid state detector are used in_______ mode.
Choose an answer
Forward bias
Reverse bias
Without bias
In sun light
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Question # 26
The source in the heat engine is at
Choose an answer
Low temperature
High temperature
Zero temperature
None of these
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Question # 27
The electric field was discovered
Choose an answer
Michel Faraday
Oersted
Newton
Ampere
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Question # 28
Which does not show polarization
Choose an answer
Longitudinal wave in gas
Transverse wave in gas
Both a and b
None of these
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Question # 29
When n-type of semiconductor is heated.
Choose an answer
Number of electrons increases while that of holes decreases
Number of holes increases while that of electrons decreases
Number of electrons and holes remains same
Number of electrons and holes increases equally.
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Question # 30
The blood pressure of the person
Choose an answer
Decreases with age
Increases with age
Remains the same
None
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Question # 31
Blood is an/a
Choose an answer
Ideal fluid
Perfect fluid
Compressible fluid
Incompressible fluid
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Question # 32
According to relation S = rθ, then θ in simple pendulum is
Choose an answer
gX/I
X/I
g/I
I/g
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Question # 33
In the Wilson's cloud chamber
α- and
β- particles are detected. What is seen in the chamber when
α-particles are let into the chamber?
Choose an answer
long straggly paths
long continuous straight trials
short continuous straight trails
short straggly paths
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Question # 34
If rope of lift breaks suddenly,The tension exerted by the surface of lift is (a = Acceleration of lift)
Choose an answer
mg
m (g + a)
m (g - a)
0
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Question # 35
Young's modulus for water is
Choose an answer
0
2
5
9
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Question # 36
Which of the following is true?
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Neither momentum nor kinetic energy is conserved in inelastic collisions
Momentum is conserved in all collisions only in inelastic collisions
Momentum is conserved in all collisions but not kinetic energy
Both momentum and kinetic energy are conserved in all collisions
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Question # 37
The concept of direction is purely:
Choose an answer
Absolute
Relative
Relative to stars always
Relative to the sun always
None of these
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Question # 38
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 # 39
Wave front is the locus or all points in vibration are in the same
Choose an answer
Frequency
Phase
Wavelength
All of these
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Question # 40
If a charge Q is dispersed over tow spheres of radii R and r such that their surface charge densities are equal. What is the ratio of the charges on the spheres?
Choose an answer
2r/R
R
2
/
r
2
R
3
/5R
3
R
4
/R
4
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Question # 41
Under feeble driving force, the amplitude of the motion may become
Choose an answer
Very small
Large
Extra large
Extra ordinarily large
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