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SOUND
Unit – V SOUND - PHYSICS
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Question 1 |
When we listen to music, the medium through which sound is propagated is ………….
Solid | |
Liquid | |
Gas |
Question 2 |
The principle on which stethoscope works is ………………
Reflection | |
Multiple reflection |
Question 3 |
In a transverse mechanical wave, the particles of the medium vibrate in a direction ………….. to the direction in which the wave travels.
Parallel | |
Perpendicular |
Question 4 |
Wave velocity = Frequency x …………….
Amplitude | |
Time period | |
Wave length |
Question 5 |
Time taken by a particle of the medium to complete one vibrate on is called ……………
Time period | |
Frequency | |
Wave length |
Question 6 |
The sensation of sound persists in the brain for about ………… of a second.
1/100 | |
1/1000 | |
1/10 |
Question 7 |
Bats send out and receive ……………. Wave reflected by the prey and obstacles.
Supersonic | |
Infrasonic | |
Ultrasonic |
Question 8 |
From the list of frequencies, find the ultrasonic frequency.
2000 Hz | |
20000 Hz | |
30000 Hz | |
10000 Hz |
Question 9 |
Find the odd one out on the basis of audiable range.
Elephant | |
Bat | |
Dolphin | |
Rabbit |
Question 10 |
Musical sound gives us …………..
Pleasure | |
Pain | |
Information | |
Tension |
Question 11 |
We are able to …………….. with each other through sound.
Quarrel | |
Quarrel | |
Work | |
Communicate |
Question 12 |
The maximum displacement of a particle from the mean position is called ………
Frequency | |
Amplitude | |
Wave length | |
Time period |
Question 13 |
Distance moved by a wave during the time a particle completed one vibration is ………………
Wave length | |
Time period | |
Amplitude | |
Frequency |
Question 14 |
Speed of light is ………..
340 m/s | |
3x108 m/s | |
320 m/s | |
5000 m/s |
Question 15 |
Bats hunt their prey by sending and receiving ………… wave
Infrasonic | |
Echo | |
Sonic | |
Ultrasonic |
Question 16 |
Ships use ……….. to find the depth of seas.
Radar | |
Sonar | |
Echo | |
Sound wave |
Question 17 |
With decrease in water vapour content in air, velocity of sound …………..
Increases | |
Decreases | |
Is constant | |
None |
Question 18 |
Doppler shift in frequency depends upon ………………
velocity of sound | |
Velocity of source | |
Velocity of listener | |
All of the above |
Question 19 |
Which of the following statements is correct?
Both sound and light waves in air are longitudinal | |
Both sound and light waves in air are transverse | |
Sound waves in air are transverse and light waves are electromagnetic transverse | |
Sound waves in air are longitudinal and light waves are electromagnetic transverse. |
Question 20 |
Which of the following waves are not mechanical?
Torsional waves | |
Microwaves | |
Seismic waves | |
Ripples |
Question 21 |
…………….. waves propagate in a medium to form compressions and rarefactions
Transverse | |
Longitudinal | |
Stationary | |
None |
Question 22 |
In transverse wave the downward and maximum displacement is called ……………
trough | |
crest | |
compression | |
rarefaction |
Question 23 |
Speed of sound in air is …………….
330 m/s | |
360 m/s | |
340 m/s | |
320 m/s |
Question 24 |
The repeated reflection that results in the persistence of sound is …………….
Echo | |
Absorption | |
reverberation | |
none |
Question 25 |
Time taken by a particle of the medium to complete one vibration is called ………….
time period | |
frequency |
Question 26 |
The number of vibrations completed by a particle in one second is called ………….
time period | |
frequency |
Question 27 |
The principle on which stethoscope works is ……………..
reflection | |
multiple reflection |
Question 28 |
Sound waves require a ……………….. to travel.
Medium | |
Phase |
Question 29 |
……………… is the area with maximum pressure.
compression | |
rarefaction |
Question 30 |
……………….. is used to determine the velocities and movements of submarines and aircrafts.
Radar | |
Sonar |
Question 31 |
- Assertion (A) : Sound waves travel faster on a raindy day than on a dry day.
- Reason (R) : Moisture increases the pressure.
A is wrong R is right | |
R explains A | |
R does not explain A | |
A is right R is wrong |
Question 32 |
Match the following:
- Ripple son surface of water - a) Longitudinal wave
- Light waves - b) Mechanical transverse
- Sound waves - c) Electro magnetic
3 1 2 | |
1 3 2 | |
2 1 3 | |
3 2 1 |
Question 33 |
Match the following:
- Light waves - a) Transverse mechanical
- Sound waves b) Electromagnetic
- Water waves - c) Longitudinal mechanical
1 3 2 | |
3 1 2 | |
2 1 3 | |
3 2 1 |
Question 34 |
Match the following:
- Amplitude - a) Time taken by a particle to complete one vibration.
- Period of vibration - b) Distance moved by a wave in one vibration.
- Frequency - c) Maximum displacement of a particle.
- Wave length - d) the number of vibrations in one second.
4 1 3 2 | |
3 1 2 4 | |
2 4 1 3 | |
3 2 1 4 |
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There are 34 questions to complete.