MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
General Knowledge
Physics
Quiz 9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q.1
The wave like properties of electrons are useful in
Magnifying objects
Lasers
Weather reports
All of the above
Q.2
Which compressor is usually used in AC?
Centrifugal
Rotary
Reciprocating
Axial
Q.3
Which sources produce alternating current (AC)?
Solar power plants
Hydro-electric generators
Batteries
All of the above
Q.4
Matter waves are
De Broglie waves
Electromagnetic waves
Transverse waves
Longitudinal waves
Q.5
An ice block with a piece of lead embeded in it floats in water. If ice melts the water level
Rises
Falls
Remains same
Falls first and then rises
Q.6
The rate of change of linear momentum of a body falling freely under gravity is equal to it's ________ ?
Kinetic Energy
Weight
Potential Energy
Impulse
Q.7
According to the theory of relativity, which of the following always remains constant ?
Length of an object
Time
Space
Velocity of light
Q.8
Positive feedback is used in
Amplifiers
Rectifiers
Oscillators
None of these
Q.9
Which of these branches of Physics deal with heat and temperature and their relation to energy and work?
Geophysics
Mechanics
Atomic Physics
Thermodynamics
Q.10
When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ?
Four times
Two times
Half
One-fourth
Q.11
Electrons carry a
Positive Charge
Negative Charge
Variable Charge
Neutral Charge
Q.12
What is a neuron ?
Basic unit of energy
Particle released during radioactivity
The anti-particle of neutron
Basic unit of nervous system
Q.13
Who indirectly determined the mass of the electron by measuring the charge of the electron?
Thomson
Millikan
Rutherford
Einstein
Q.14
The best material for the core of a transformer is
Stainless steel
Mild steel
Hard steel
Soft iron
Q.15
Alternating current is converted into direct current by a
Transformer
Dynamo
Oscillator
Rectifier
Q.16
________ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system.
First law of thermodynamics
Hooke's Law
The coulomb's law
Faraday's Law
Q.17
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :
1.0
1.2
1.5
2.0
Q.18
Intensity of any wave is proportional to which of the following?
Amplitude
Square of amplitude
Square root of amplitude
Cube of amplitude
Q.19
When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are
Longitudinal
Transverse
Both longitudinal and transverse
Waves are not produced
Q.20
Which of the following is not a transverse wave?
Light waves
Radio waves
Sound waves
All the above
Q.21
The characteristic invalid for heat radiation is that it travels :
In a straight line
In all directions
With the speed of light
Heating the medium through which it passes
Q.22
An atom with more neutrons than protons is called
Compound
Element
Isotope
None of the above
Q.23
Which electromagnetic radiation is used for satellite communication ?
Ultraviolet
Infrared
Radiowave
Millimeter wave
Q.24
When an atom loses an electron it becomes
Neutron
Negative ion
Positive ion
None of the above
Q.25
A transformer works on the principle of
Self induction
Mutual induction
Generator
Inverter
Q.26
Transformer is a device to convert
D.C. to A.C.
Low voltage D.C. into high voltage D.C.
Low voltage A.C. into high voltage A.C.
Mechanical energy into Electrical energy
Q.27
Speed regulation of synchronous motor is
1%
25%
Zero
0.5%
Q.28
A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become
C
C/7
7C
14C
Q.29
Which phase change is an example of an exothermic process?
Liquid to Solid
Gas to Solid
Gas to Liquid
All the above
Q.30
The velocity of heat radiation in vacuum is
Equal to that of light
Less than that of light
Greater than that of light
Equal to that of sound
Q.31
If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?
4 : 1
2 : 1
1 : 16
1 : 4
Q.32
Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?
It is narrow band of high-velocity wind.
It follows the wave path near the tropopause at elevations of 8 km to 15 km.
Jet streams are typically continuous over long distances.
In summer, the polar front jet achieves its maximum force.
Q.33
When a light wave is reflected from a mirror, there is a change in its
Frequency
Amplitude
Wavelength
Velocity
Q.34
A doppler effect occurs when a source of sound moves
Away from you
Towards you
Both A & B
None of the above
Q.35
What is the name of the device used to convert alternating current into direct current ?
Ammeter
Galvanometer
Rectifier
Transformer
Q.36
A Step-Up transformer increases
Power
Current
Frequency
Voltage
Q.37
A transformer
Converts DC to AC
Is used to decrease or increase AC voltage
Converts AC voltage to D.C. voltage
Converts electrical energy into mechanical energy
Q.38
What part of the atom has a positive charge?
Neutron
Proton
Electron
All the above
Q.39
Who was the first scientist to discover Electrons?
Albert Einstein
Isaac Newton
J.C. Bose
J.J Thompson
Q.40
What is the size of Electron as comapared to Proton and Neutron?
1/355
1/1236
1/1836
1/1923
Q.41
The force that binds the neutrons and protons in a nucleus is called as:
Weak Nuclear Force
Strong Nuclear Force
Electromagnetic Force
Gravitational Force
Q.42
Refrigeration is a process which
Kills bacteria
Slows down the bacterial growth
Inactivates the bacteria
Plasmolyses the bacteria
Q.43
Blowing Air with open pipe is an example of :
Isothermal process
Isochroric process
Isobaric process
Adiabatic process
Q.44
Conservation of energy refers to the fact that
If you conserve energy you will not be as tired
Energy cannot be created or destroyed but can be converted from one form to another
No chemical reaction is 100 percent efficient
The entropy of the universe is always increasing
Q.45
Which of the following causes adiabatic temperature changes in atmosphere?
Deflection and advection
Latent heat of condensation
Expansion and compression of the air
Partial absorption of solar radiation by the atmosphere
Q.46
The wavelength at which the peak of intensity of blackbody radiation occurs
Increases with increase in temperature
Decreases with increase in temperature
Is the same at all temperatures
Does not follow any pattern as temperature changes
Q.47
Which of the following principle is used to produce ''low-temperatures' ?
Super conductivity
Joule-Kelvin effect
Thermo-electric effect
Adiabatic demagnetisation
Q.48
The three famous law of Kepler is related to
Optics
Speed
Oscillations
Planetary Motion
Q.49
Atomic hydrogen has a life period of
One hour
One day
One minute
A fraction of a second
Q.50
The Law of Kepler is related with which among the following ?
Planetary Motion
Law of Conservation of energy
Law of Gravitation
None
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page