Sound is a vibration that travels through a medium, such as air, water, or solids, creating audible waves. It involves concepts like frequency, amplitude, and pitch, and is essential in fields like acoustics, music, and communication.
Physics chapter 2 class 10 Notes
The disturbance travelling in a medium is called: Wave motion
In simple harmonic motion, the acceleration of the body is _____. Proportional to the displacement: Directly
The sound level of rustling of leave is: 10 dB
The loudness of sound is most closely related to its: Amplitude
At mean position of pendulum, the potential energy of the pendulum is: Minimum
In simple pendulum motion, restoring force is provided by: Weight of the body
Coaxial cable are used to transmit signals: Electric
the water waves after striking the hurdle will: reflect
1 MB = 1024KB
Which is an example of a longitudinal wave: Sound wave
Old people can not hear sound above then _____ Hz: 15000
When frequency of sound wave is increased, which of the following decreases? i) Wavelength ii) Period iii) Amplitude: i and ii only
The speed of sound in the air at one atmospheric pressure at room temperature is: 343 ms-1
The force applied on the mass attached with a spring is represented by: fext
Information storage device work on the principles of: Magnetism
The waves in which particles of the medium vibrate parallel to the direction of waves are called: Longitudinal waves
The product of frequency and time period is equal to: 1
At extreme position potential energy of the pendulum is: Maximum
The value of acceleration is simple harmonic motion at mean position is: Zero
If the mass of bob of a simple pendulum is doubled, its time period: Remains same
High pitch means: High frequency
The unit of spring constant is: Nm-1
The speed of sound in iron at 25 oC is ms 1: 5950
The distance between two consecutive compressions or rarefactions in longitudinal waves is called: Wavelength
Which component is output device of computer: Monitor
The waves in which particles of the medium vibrate perpendicular to the direction of waves are: Transverse waves
the number of waves passing through a point in one second is called: frequency
After how much time the echo must be heard: 0.1 s
The difference between the loudness of faintest audible sound and loudness of another sound is called: Quality of sound
Pitch of sound depends upon: Frequency
The speed of sound in air at 0 oC is: 331 ms-1
Time period is reciprocal of: Frequency
The intensity of lawn mover is: 10-2wm-2
the distance between two consecutive trough or crest is called: wavelength
Which form of energy is sound: Mechanical
To hear echoes, the minimum distance of the obstacle from source of sound should be: 17 m
The ration of external force applied on the spring to displacement is called: Spring constant
The waves which travel in straight line through space and have strong signals are called: Micro waves
The S.I unit of intensity of sound is: Wm-2
To hear echo, the distance between the observer and the obstacle is 17m then how much distance will the sound travel: 34m
The product of frequency and wavelength is equal to: Wave speed
Radio waves are: Electromagnetic waves
How does sound travel from its source to your ear: Byc changes in air pressure
Astronauts is space need to communicate with each other by radio links because: Sound waves cannot travel in space
Micro waves are used in: Mobile phone
The maximum displacement from mean position is called: Amplitude
The speed of sound is air at 21 oC is: 343 ms-1
the motion in which the friction reduces the mechanical energy of the system as time passes and the amplitude of motion reduces is called: Random motion
The character by which lound and faint sound can be distinguished is called: Loudness
At mean position kinetic energy of the ball is: Maximum
The waves, which are used to detect the broken bones are called: x-rays
The speed of sound was accurately measured in: 1738
The oscillations of a system in the presence of which force are called damp oscillations: Resistive force
If the intensity of faintest audible sound is Io and of another sound is I then sound level will be: K log I/Io
Ripple tank is an instrument which is used to study the characteristics of: Mechanical waves
Sound waves are an example of: Longitudinal waves
The speed of sound of water at 25 oC is: 1531 ms-1
the part of waves at which particles of the medium are below the normal position are called: trough
1 KB = : 1024 bytes
Bets can hear sound of frequency up to: 120,000 Hz
The sound waves are the example of: Longitudinal waves
When a body moves to and fro about a point, its motion is called: Vibratory motion
The example of shock absorber of the vehicles are: Damped motion
Mathematical formula of sound level (in bel) is: S.L = Log I/Io (bel)
The displacement produced in the spring is directly proportional to force is called: Hook’s law
If the displacement in spring is ‘x’ of mass “m” attached with a spring then restoring force is: F=-kx
1 GB =: 1024MB
the time period of body attached to spring depend on: mass
If there is no extension in the spring then the position is called: Equilibrium position
The unit of intensity of sound: wm-2
For normal person audible frequency range for sound wave lies between: 20 Hz and 20KHz
Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly ………. To the wavelength of the wave: Equal
The frequency of silent whistle is: 20,000 Hz – 25000 Hz
Important : Review all previous years’ 10 class past papers for comprehensive practice and better exam preparation.