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MDCAT Physics Online Test MCQs With Answers
Question # 1
The value of young's modulus is maximum for:
Choose an answer
Dimond
Copper
Ice
Mercury
Water
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Question # 2
At the top of the trajectory of a projectile the directions of its velocity and acceleration are
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Perpendicular to each other
Parallel to each other
Inclined to each other at an angle of 45°
Antiparallel to each other
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Question # 3
When current flows through a conductor, its temperature
Choose an answer
Increases
Decreases
Remains the same
May rise or fall
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Question # 4
The central point in the Newton's rings is dark due to
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Destructive interference
Constructive interference
Additional of path difference λ/2
b and c
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Question # 5
The height at which the satellite stay directly above a particular point on the surface of the earth above the equator is
Choose an answer
24000 km
36000 km
42000 km
None of these
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Question # 6
A truck and a car are moving with equal velocity. On applying the brake both will stop after certain distance then
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Truck will cover less distance before rest
Car will cover less distance before rest
Both will cover equal distance
None
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Question # 7
The blood vessels are inflated eve in
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Relaxed states between heart beat
Working state between hear beat
Occasionally
None of these
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Question # 8
Aluminium is a:
Choose an answer
Good insulator
Bad conductor
Both A and B
Excellent conductor
Semi conductor
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Question # 9
In the subatomic world few things can be predicted with precision of
Choose an answer
50 %
75 %
100 %
None of these
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Question # 10
An inertial frame of reference is a coordinate system in which
Choose an answer
Energy is conserved
Momentum is conserved
Law of inertia is valid
None of these
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Question # 11
Among the following select the correct statement
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The rate of disintegration to directly proportional to the number of atoms present in the sample at that instant
Equal fractions disintegrate in equal intervals of time
Radioactive sample takes an infinite time ti disintegrate
All of the above
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Question # 12
The frequency used in microwave oven is
Choose an answer
2000Hz
2450Hz
2450MHz
2780Hz
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Question # 13
The SI units of acceleration is
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LT
LT
-1
LT
-2
L
2
T
-2
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Question # 14
Wheatstone bridge is an instrument use to determine the
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Voltage
Current
Resistance
Unknown resistances
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Question # 15
A stethoscope detects the instant at which the external pressure is
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Greater than systolic pressure
Equal to systolic pressure
Lower than systolic pressure
None of these
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Question # 16
A body is in its state of stress when it is
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Displaced from its equilibrium position
Remains at rest when shape changed
Their angles change
All of them
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Question # 17
The output of a two inputs OR gate is O only when its
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Both inputs are O
Either input is 1
Both inputs are 1
Either input is zero
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Question # 18
Electrons are
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positively charged
negatively charged
masslesss
neutral
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Question # 19
Alternating current instead of direct current is used in long distance electric transmission because
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It is easy to generate
Rectification is possible
Energy losses are minimum
It causes fewer accidents
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Question # 20
The valence energy band may be either
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Completely filled
Partially filled
a and b
All of them
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Question # 21
The examples of diamagnetic substances
Choose an answer
Water
Copper
Antimony
All of them
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Question # 22
Due to radical field, a moving coil galvanometer
Choose an answer
Comes to rest quickly
Magnetic filed becomes strong
Movement is frequent
None of these
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Question # 23
For motion of a simple pendulum to be simple harmonic
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Amplitude of motion will be every small
Amplitude of motion will be very large
Independent of amplitude of motion
None of these.
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Question # 24
The materials in the form of wire or rod or plate which leads the current into or out of the electrolyte is known as
Choose an answer
voltmeter
resistance
electrode
current
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Question # 25
The direction of induced current in a certain coil can easily be found by using
Choose an answer
Right hand rule
Faraday's law
Lenz's law
None of these
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Question # 26
When a stress changes length, it is called the
Choose an answer
compressional stress
tensile stress
shear stress
any one of them
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Question # 27
In case of a vibrating Pendulum if the mass of the pendulum is doubled then its time period
Choose an answer
Becomes one half
Becomes double
Remains same
Become one fourth
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Question # 28
The photoelectric effect establishes that
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Light travels in the form of quanta of energy
Light travels in the form of transverse waves
Light travels in the form of longitudinal waves
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Question # 29
Electromagnetic radiation or photons interact with matter in
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two distinct ways
three distinct ways
four distinct ways
five distinct ways
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Question # 30
A P-n junction cannot be used as
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Detector
Amplifier
Rectifier
All
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Question # 31
Angular frequency 'ω' is the characteristic of circular motion, with can be use to computer the value of
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Instantaneous displacement
Instantaneous velocity
Instantaneous acceleration
a and b
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Question # 32
The SI unit of stress is
Choose an answer
Nm
2
Nm
dynesm
-1
N
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Question # 33
The first law of thermodynamics defined as
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Conversion of heat energy into mechanical energy
Conversion of heat energy into vibrational energy
Conversion of heat energy into translational energy
All of these
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Question # 34
What type of temperature coefficient of resistance are thermisters
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Negative
Positive
Neutral
Positive and negative
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Question # 35
Energy in a wave moves because of the
Choose an answer
Medium
Phase
Motion of particles
None of these
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Question # 36
Time period of a vibrating body is
Choose an answer
Time to take 1/2 vibration
Time to take 1 vibrations
Time for 30 vibrations
None of these
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Question # 37
Who corrected the Newton's formula for the velocity of sound
Choose an answer
Young
Laplace
Kelvin
Einstein
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Question # 38
Maximum density of H
2
O is at the temperature
Choose an answer
32°F
39.2°F
42°F
4°F
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Question # 39
Germanium have negative co-efficient of temperature its
Choose an answer
R
t
> R
o
R
t
< R
o
R
t
= R
o
None of these
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Question # 40
Under same environment the measurement of a physical quantity gives different values. The error in measurement is called
Choose an answer
Random error
Systematic error
Physical error
Uncertainty
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Question # 41
Magnetic effect of current is used:
Choose an answer
In electric motor
To detect current
To measure current
All of these
None of these
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