Tag: physics

Questions Related to physics

Why Trees are  planted along the roads

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. To make the roads beautiful

  2. To reduce sound

  3. To provide shade

  4. All

Show answer
Correct Option: B
Explanation:

Trees are planted along the roads and around buildings so that it could cut off sound vibrations produced from vehicles speakers etc. by absorbing them, hence leading in prevention of Noise pollution.

State whether given statement is True or False :
Music for one person can be noise to others.

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Music for a person depends upon the nature , feelings and mood of the person , therefore music for one person can be noise for others .

To reduce noise pollution, which of the following devices must be installed on the vehicles ?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Lights

  2. Speedometer

  3. Horn

  4. Silencer

Show answer
Correct Option: D
Explanation:

Lights in a vehicle are used to experience the  view ahead of vehicle , in low light .

Speedometer is used to measure the speed of vehicle .
Horn is used to signal other vehicles , and a horn produces noise pollution .
Silencer in a vehicle is used to reduce the sound of the engine of vehicle , therefore it must be installed on the vehicles to reduce noise pollution .

The waveform of noise sound is 

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Irregular

  2. Sudden

  3. Periodic

  4. Both A and B

Show answer
Correct Option: D
Explanation:

Music is a pleasant sound, whereas noise is unpleasant to hear. The waveform of musical sound is periodic and regular whereas the waveform of noise is irregular and sudden.
The frequencies that make up a musical sound are in the ratio of small whole numbers whereas this is not the case for noise.

Presence of excessive unwanted sounds in the environment is called 

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. air pollution

  2. noise pollution

  3. water pollution

  4. all of these

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Correct Option: B
Explanation:

Pollution is that , which harms our environment or health of animals on earth , excessive unwanted sounds are harmful to ear , therefore it is called noise pollution .

Which of the following is not caused due to noise pollution?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Lack of sleep

  2. Hypertension

  3. Diabetes

  4. Anxiety

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Correct Option: C
Explanation:

Diabetes is not caused by noise pollution , as diabetes is caused due to lack of insulin in human body . 

The characteristics of musical sound are

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Intensity

  2. Frequency

  3. Quality

  4. All

Show answer
Correct Option: D
Explanation:

The characteristics of musical sound are:

(i) loudness (intensity)

(ii) pitch (frequency)

(iii) quality (overall effect of all the harmonics present in the sound).

State whether given statement is True or False :
Sound from outer space adds to the noise pollution on the earth.

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Sound from outer space does not reach the earth surface as there is vacuum in the outer space. Obviously the sound from outer space can not add up to the noise pollution on the earth.

What does music comprise of?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. High Frequency, regular waveform and no sudden changes in amplitude or wavelength

  2. Low Frequency, regular waveform and no sudden changes in amplitude or wavelength

  3. High Frequency, Irregular waveform and no sudden changes in amplitude or wavelength

  4. Low Frequency, Irregular waveform and sudden changes in amplitude or wavelength

Show answer
Correct Option: A
Explanation:

Music is harmonious sound described as high frequency, regular waveform and with no sudden changes in amplitude or wavelength.

Which of the following is / are effective for preventing noise pollution?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Construction of sound proof rooms for noisy machinery in industries

  2. Ban on use of horns with jarring sound

  3. Vegetation along roads in residential areas

  4. All of the Above

Show answer
Correct Option: D
Explanation:

All the steps mentioned are effective ways, among others, for preventing noise pollution.