MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
General Knowledge
Physics
Quiz 21
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
Decibel is a term connected with :
Air
Water
Sound
Soil
Q.2
Decibel is the unit used for
Speed of light
Intensity of heat
Intensity of sound
Radio wave frequency
Q.3
In SONAR which kind of wave is used?
Infrasonic
Ultrasonic
Radio
Audible sound
Q.4
Sound waves cannot travel through
Gas
Liquid
Vacuum
Solid
Q.5
Which determines the frequency of a sound wave?
Amplitude
Speed
Source
Medium
Q.6
Which is best used as a sound absorbing material in partition walls ?
Stone chips
Steel
Glass - wool
Glass pieces
Q.7
Speed of sound is the greatest in :
Water
Air
Glass
Glycerine
Q.8
The unit of noise pollution (level) is :
Decibel
Decimal
Ppm
None of these
Q.9
The speed of sound travel fastest through
Liquid
Solid
Gas
None of the above
Q.10
The number of waves per second in a sound is called ________ of that sound.
Velocity
Frequency
Displacement
Acceleration
Q.11
Sound waves do not show the phenomenon of
Refraction
Interference
Diffraction
Polarisation
Q.12
Sound becomes hazardous noise pollution at decibels?
Above 120 db
Above 80 db
Above 50 db
Above 30 db
Q.13
The speed of sound in air depends on
Frequency
Temperature
Wavelength
None of the Above
Q.14
An object at rest may have
Momentum
Potential energy
Velocity
Kinetic energy
Q.15
The pitch of sound depends on its
Frequency
Intensity
Velocity
Amplitude
Q.16
What apparatus is used to locate a submerged object?
Radar
Sonar
Quasar
Pulsar
Q.17
Compressions and Rarefactions are characteristic of
Longitudinal waves
Transverse waves
Both A & B
Neither of A & B
Q.18
Least audible sound for most of the human ear is :
10.0 µ bar
0.0002 µ bar
0.005 µ bar
5.0 µ bar
Q.19
Speed of sound is maximum in which among the following?
Gases
Vaccum
Liquids
Solids
Q.20
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
The ringing is not loud enough
The glass of the bell jar absorbs the sound waves
The bell jar is too small
There is no air or any other gas in the bell jar
Q.21
Which conservation principle is applicable in the case of the motion of a rocket?
Conservation of mass
Conservation of charge
Conservation of momentum
Conservation of energy
Q.22
Rocket works on the principle of
Newton's Third Law
Newton's First Law
Newton's Second Law
Archimedes Principle
Q.23
When a card placed over a tumbler is flicked with the finger, the coin placed over it falls in the tumbler.
Law of conservation of energy
Newton's third law of motion
Law of Inertia
Law of conservation of momentum
Q.24
According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the ________ of an object.
Density
Volume
Force
Mass
Q.25
Lightning heats the surrounding air to
300 deg Cent
3000 deg Cent
30000 deg Cent
300000 deg Cent
Q.26
Which of the following is not an intrusive igneous body?
Stock
Dike
Stope
Batholith
Q.27
A decibel is
A musical instrument
The wavelength of noise
A musical note
A measure of sound level
Q.28
Hertz is a unit for measuring
Intensity of waves
Frequency of waves
Wavelength
Clarity of waves
Q.29
What is the full form of "RADAR" ?
Radio Detecting and Ranging
Region Device and Ranging
Radio Detect and Rangs
Radio Device and Ranging
Q.30
A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
Greater than the weight of the man
Less than the weight of the man
Same as the weight of the man
Zero
Q.31
Who defined the law of gravitation ?
Newton
Archimedes
Galileo
Faraday
Q.32
When a bullet is fired from a gun
The gun moves forward
The gun jumps up
The gun does not move
The gun recoils with the same momentum as the bullet
Q.33
The inability of a body to change its state of rest or uniform motion along a straight line is called its
Momentum
Velocity
Acceleration
Inertia
Q.34
A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to
Outward pull on him
Inertia of motion
Change in momentum
Change in acceleration
Q.35
When a running car stops suddenly, the passengers tends to lean forward because of:
Centrifugal force
Inertia of rest
Inertia of motion
Gravitational force
Q.36
Why does a cannon recoil after firing ?
Conservation of energy
Backward thrust of gases produced
Newton's third law of motion
Newton's first law of motion
Q.37
When a constant force acts on an object with a mass of 8 kg for a duration of 3 s. it increases the object's velocity from 4 m/s to 6 m/s . What is the magnitude of the applied force?
5.33 N
4.33 N
6.33 N
3.33 N
Q.38
The instrument for measuring intensity of earthquakes is called
Ediograph
Pantagraph
Ergograph
Seismograph
Q.39
An instrument that records earthquakes is
Ergograph
Ediograph
Thermograph
Seismograph
Q.40
It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?
Law of inertia
Newton's second law
Newton's third law
Pascal's law
Q.41
One watt-hour is equivalent to
6.3 x 10
3
J
6.3 x 10
-7
J
3.6 x 10
3
J
3.6 x 10
-3
J
Q.42
In the Earth, the weight of a body is maximum at the
North Pole
South Pole
Equator
Surface
Q.43
The moment of inertia of a body does not depend upon its
Axis of rotation
Angular velocity
Form of mass
Distribution of mass
Q.44
An athlete runs before long jump to get advantage on
Inertia of motion
Frictional force
Moment of a force
Principle of moments
Q.45
What is the gravity of moon as compared to the Earth
1/4 th of Earth
1/5 th of Earth
1/6 th of Earth
1/8 th of Earth
Q.46
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
Conduction
Convection
Radiation
Both conduction and convection
Q.47
When a ring of metal is heated what happens to its hole ?
Expands
Contracts
It expands or contracts according to its diameter
It expands or contracts according to its coefficient of expansion
Q.48
The base of an electric iron is brightly polished mainly
To make it smooth and frictionless
To make it rust-proof
To reduce heat loss by radiation
To make it more durable
Q.49
A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because
The floor and carpet are at different temperatures
The stone conveys the heat away from the feet more rapidly than the carpet
The carpet is a better conductor of heat than the stone
The human body maintains a constant temperature
Q.50
A body of mass 5 kg accelerates from 12 m/s to 20 m/s in 4 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).
40
10
20
80
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