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1.
You must have seen the doctor checking the sounds produced in the chest or heartbeat of a patient using a medical instrument called Stethoscope. On what principle does this Stethoscope work?
2.
If the speed of a wave is 380 m/s and its frequency is 1900 Hz, then the wavelength of the wave will be:
3.
4.
Which of the following can produce longitudinal as well as transverse waves under different conditions?
5.
The bats can fly in the darkness of night without colliding with the other objects by emitting special sounds while flying. Which characteristic of sound is used by the bats to navigate?
6.
Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the string suitably. By doing so, he is adjusting
i. Amplitude of the sound
ii. Frequency of the sitar string with the frequency of other musical instruments
iii. Intensity of sound
iv. Loudness of sound
Choose the correct option:
i. Amplitude of the sound
ii. Frequency of the sitar string with the frequency of other musical instruments
iii. Intensity of sound
iv. Loudness of sound
Choose the correct option:
7.
We can easily distinguish between the sounds of the different singers even without having seen them. This is all due the different quality or timber of their sounds. On what factor does the quality of sound depend?
8.
Loudness measures the sound energy reaching the ear per second and depends on the amplitude of the sound wave. What is the unit used to measure the loudness of sound?
9.
10.
On increasing the temperature, the speed of sound in air: