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MDCAT Physics Online Test MCQs With Answers
Question # 1
For transmission of both transverse and longitudinal waves, we can use:
Choose an answer
Solid
Gas
Plasma
None of these
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Question # 2
For the structural analysis of the crystal, X-rays are used because
Choose an answer
X-rays have wavelengths of the order of interatomic spacing
X-rays are highly penetrating radiation
Wavelength of X-rays is of the order of nuclear size
The wavelength of X-rays is of the order of 546 nm
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Question # 3
CT scanning is the abbreviated name of
Choose an answer
Computed Technology
Computed Technique
Computed Technology
Computerized Axial Tomography
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Question # 4
Two pipes one is open end other is closed at one end are of same length then the ratio of their fundamental frequencies is
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1 : 2
2 : 1
1 : 1
1 : 4
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Question # 5
In a laminar flow of non-viscous fluid along a horizontal pipe,the work done per second by the pressure at any section is equal to
Choose an answer
The pressure
Pressure x volume per second
Pressure x area of cross-section
Pressure x volume
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Question # 6
Tick the correct statement:
Choose an answer
Both the potential and potential difference are scalar
Potential is a scalar but potential difference is a vector
Both are vectors
Potential is a vector but potential difference is a scalar
None of these is correct
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Question # 7
In depletion region
Choose an answer
Holes are not present
Electrons are not present
Both are not present
None of these
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Question # 8
When mass m = 0.50 kg and spring constant K = 245 kgs
-2
. Find the time period of the system
Choose an answer
0.12 sec
0.20 sec
0.28 sec
0.29 sec
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Question # 9
The aim of CT scanning is to
Choose an answer
make a 3-dimensional image
make an image of a section through the body
make an image of a section through the body from measurements taken about its axis
all of them
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Question # 10
If a particle of a medium is simultaneously acted upon by 'n' waves then its resultant amplitude is
Choose an answer
the difference of these n waves
the sum of these n waves
half of the difference of these n waves
half of the sum of these n waves
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Question # 11
The work done on the system by the environment is taken as
Choose an answer
Positive
Neutral
Negative
None of these
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Question # 12
Which one of the following particles moving in the magnetic field cannot be deflected?
Choose an answer
neutrons
β-particles
α-particles
electrons
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Question # 13
The following expression represent
ΔU = -W
Choose an answer
Isothermal expansion
Isobaric process
Adiabatic compression
None of these
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Question # 14
When an element X emits gamma-rays, its atomic number Z
Choose an answer
Increases by 1
Decreases by 1
Remains same
None of these
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Question # 15
The principle of potentiometer is given by
Choose an answer
V ∞ I
V ∞
I
V ∞ 1/
I
V ∞ I/E
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Question # 16
Radioactive was discovered in
Choose an answer
1820
1875
1896
1906
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Question # 17
How many kinds of laser are there?
Choose an answer
Solid only
Liquid only
Gaseous only
All of these
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Question # 18
Speed of efflux increases if
Choose an answer
Distance of hole from surface of water increases
Distance of hole from bottom decreases
Independent of distance of hole from surface
Both a and b
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Question # 19
In petrol engine, the first stroke is the
Choose an answer
Power stroke
In take stroke
Exhaust stroke
None of these
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Question # 20
The difference in angular momentum associated with the electron in the two successive orbits of hydrogen atom is
Choose an answer
h/π
h/2π
h/2
(n-1) h/2π
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Question # 21
The practical use of services by optic fiber is
Choose an answer
Two way television
World processing
Image transmitting and receiving equipment
All of these
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Question # 22
Dielectric has the charge of the type inside it
Choose an answer
Moving charge
Static charge
Both a & b
None of these
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Question # 23
In carbon colour coded resistances, if there is no fourth band, then it is understood that the tolerance is
Choose an answer
± 50 %
± 40 %
± 30 %
± 20 %
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Question # 24
The sequare root of 0.4 is____:
Choose an answer
Greater than 0.4
Smaller than 0.4
Equal to 0.4
None of them
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Question # 25
A particle executes SHM with frequency f. The frequency with which its K.E. oscillates is
Choose an answer
f/2
2f
f
4f
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Question # 26
The emf produced by the motion of a coil across a magnetic field is called
Choose an answer
Induced emf
Self induced emf
Motional emf
emf
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Question # 27
α-particle is absorbed by
Choose an answer
1 mm sheet of copper
A paper
Lead sheet of 1 cm
None of these
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Question # 28
An ideal voltmeter would have an infinite
Choose an answer
Current
Voltage
Resistance
None of these
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Question # 29
If the distance between two charges is doubled, the force between them will become:
Choose an answer
Double
Half
Three times
One fourth
One third
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Question # 30
The location and speed any where on earth can now be determined to an accuracy of about
Choose an answer
100 cms
-1
50 cms
-1
30 cm
-1
2 cm
-1
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Question # 31
An airplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m.When it is vertically above a point A on the ground a bomb is released from it.The bomb strikes the ground at point B.The distance AB is
Choose an answer
1200 m
0.33 km
3.33 km
33 km
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Question # 32
The linear momentum of the body is defined as
Choose an answer
p=ma
p=1/2ma
P= mv
p=1/2mv
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Question # 33
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 # 34
The number of isotopes of hydogen are
Choose an answer
2
1
3
4
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Question # 35
A boy is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about
Choose an answer
80 m
20 m
160 m
40 m
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Question # 36
The quenching of gas by a quenching gas is called
Choose an answer
Quenching
Self quenching
Forced quenching
None of these
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Question # 37
The angular momentum of the orbital electron is integral multiple of:
Choose an answer
h
2πh
h/2π
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Question # 38
For which position will be maximum blood pressure in a body have the smallest value
Choose an answer
Standing upright
Sitting relaxed
Lying horizontally
Standing on one's head
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Question # 39
Which of the following is the smallest unit?
Choose an answer
Millimeter
Angstrom
Fermi
Metre
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Question # 40
Carbon resistors consist of a high-grade ceramic rod or con called the
Choose an answer
rheostat
tolerance
substrate
resistor
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Question # 41
The amount of charge passing through a wire in certain interval of time is 1.6 pico coulombs. The number of electrons are then:
Choose an answer
10
7
10
15
10
10
10
16
None of these
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