Physics GK · all questions

Sounds waves and Motion
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Q181

Sound moves through the air and reaches our ears and gives us . . . . . . . .

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Q182

When a longitudinal wave moves through a certain medium; the quantity which is transmitted through the medium is

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Q183

When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

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Q184

Which one of the following statements is not correct

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Q185

To hear a distinct echo the time interval between the original sound and the reflected sound must be at least

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Q186

An oscilloscope is an instrument which allows us to see waves produced by

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Q187

The velocity of sound is maximum in

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Q188

What is the purpose of 'evolved Laser Interferometer Space Antenna, (eLISA)' project?

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Q189

The sound produced by a bat is

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Q190

Which of the following is not a characteristic of wave?

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Q191

The speed of a body that has mach number more than 1 is

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Q192

A wave has a frequency of 50 Hz and a speed of 36m/s. What is the wavelength of this wave?

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Q193

Match the following-

(Electromagnetic Waves)	(Uses)
(P) Radio waves -	(i) Remote switch of household electronic
(Q) Micro waves -	(ii) Radar system used in aircraft
(R) Navigation Infrared Rays -	(iii) Cellular Phones
(S) Gamma rays in cancer -	(iv) Medicine to destroy cells

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Q194

Which of the following statements is true about the speed of sound in different mediums at 25°C?
A. Speed of sound in steel is 5960 km/s.
B. The speed of sound in nickel is 6040 m/s.

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Q195

Which of the following represents the decibel level of rustling of tree leaves in normal circumstance?

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Q196

By which a sound is reflected from a distance of at least 17m (approx) . . . . . . . . happens.

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Q197

The sensation of sound persists in the human brain for about:

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Q198

Which one of the following animals can hear ultrasonic sound?

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Q199

Which colour has the shortest wavelength?

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Q200

Match the columns.

List-I	List-II
a. Audible waves	1. below 20 Hz
b. Infrasonic waves	2. 20 Hz to 20,000 Hz
c. Ultrasonic waves	3. above 20,000 Hz

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