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NCAT - Practice Test - Physics - Waves Quiz

Attempt 10 MCQs on NCAT - Practice Test - Physics - Waves | Quiz 10

91. Speed of sound in air at 27°C is 347 m/s. What will be speed at 127°C?



92. A string has fundamental frequency 200 Hz. If its length is doubled, new fundamental frequency is:



93. A stationary wave on a string has wavelength 2 m. What is the distance between a node and the next antinode?



94. The third harmonic of a string of length 1.5 m has frequency 300 Hz. Find wave speed.



95. A string of length 0.9 m vibrates in its third harmonic. Speed of waves on string is 180 m/s. Find frequency.



96. A point source emits spherical waves. The amplitude at 1 m is A. What is the intensity at 2 m relative to that at 1 m?



97. Newton calculated speed of sound as 280 m/s. Laplace correction multiplies this by what factor?



98. A string length 0.6 m, mass 6 g, vibrates in third harmonic at 200 Hz. Find tension.



99. A string of length 0.5 m, mass 4 g, tension 100 N. Find fundamental frequency.



100. If pressure of air is doubled at constant temperature, what happens to speed of sound?



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