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Class XI Physics Waves 4
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Question 1
The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from
Question 2
A steel rod 100 cm long is clamped at its-mid-point. The fundamental frequency of longitudinal vibrations of the rod is given to be 2.53 kHz. What is the speed of sound in steel?
Question 3
A resonance air column of length 20 cm resonates with a tuning fork of frequency 250 Hz. The speed of sound in air is
Question 4
Two waves 
and 
superimpose. The ratio the maximum to the minimum intensity the resultant wave is
and superimpose. The ratio the maximum to the minimum intensity the resultant wave is Question 5
Standing waves are produced by superposition of two waves
y1 = 0.05 sin (3πt – 2x) and
y2 = 0.05 sin (3πt + 2x)
Where x and y are measured in meter and t in second. Find the amplitude of particle at x = 0.5m [cos 57.3 = 0.54]
y1 = 0.05 sin (3πt – 2x) and
y2 = 0.05 sin (3πt + 2x)
Where x and y are measured in meter and t in second. Find the amplitude of particle at x = 0.5m [cos 57.3 = 0.54]
Question 6
A closed organ pipe and an open organ pipe of same length produce 2 beats/second while vibrating in their fundamental modes. The length of the open organ pipe is halved and that of closed pipe is doubled. Then, the number of beats produced per second while vibrating in the fundamental mode is
Question 7
Two tuning forks of frequency 250 Hz and 256 Hz produce beats. If a maximum is observed just now, after how much time the minimum is observed at the same place -
Question 8
A 160 watt infrared source is radiating light of wavelength 50000Å uniformly in all directions. The photon flux at a distance of 1.8m is of the order of
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Jan 4JEE & BITSAT
