Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

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

Why Trees are  planted along the roads

  1. To make the roads beautiful

  2. To reduce sound

  3. To provide shade

  4. All
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Lights

  2. Speedometer

  3. Horn

  4. Silencer
Reveal answer Fill a bubble to check yourself
D Correct answer
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 .

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

The waveform of noise sound is 

  1. Irregular

  2. Sudden

  3. Periodic

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Presence of excessive unwanted sounds in the environment is called 

  1. air pollution

  2. noise pollution

  3. water pollution

  4. all of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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 .

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

What does music comprise of?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

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

Which of the following is / are effective for preventing noise 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
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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