A source of sound S emitting waves of frequency 100 Hz and an observer
A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of 19.4 ms⁻¹ at an […]
Waves
The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second
The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of organ pipe open at both […]
The number of possible natural oscilations of air column in a pipe closed
The number of possible natural oscilations of air column in a pipe closed at one end of length 85 cm whose frequencied lie below 1250 Hz are (Velocity of sound = 340 m s⁻¹)
If n₁, n₂ and n₃ are the fundamental frequencies of three segments into which a string
If n₁, n₂ and n₃ are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by
Options
(a) 1/n=1/n₁+1/ […]
A speeding motorcyclist sees traffic jam ahead him. He slows down to 36 km per hour
A speeding motorcyclist sees traffic jam ahead him. He slows down to 36 km hour⁻¹. He finds that traffic has eased and a car moving ahead of him at 18 km hour⁻¹ is honking at […]
Two tuning forks are sounded together and produce 2 beats per second.
Two tuning forks are sounded together and produce 2 beats per second. The frequency of one of them is 288 Hz. The other is loaded with some wax and now they produce four beats per […]
When a sound wave of wavelength λ is propagating in a medium,
When a sound wave of wavelength λ is propagating in a medium, the maximum velocity of the particle is equal to the wave velocity. The amplitude of wave is
Options
(a) λ (b) λ/2 […]
A car moving with a velocity of 36 km/hr crosses a siren of frequency 500 Hz.
A car moving with a velocity of 36 km/hr crosses a siren of frequency 500 Hz. The apparent frequency of siren after passing it will be
Options
(a) 520 Hz (b) 485 Hz (c) […]
Two points are located at a distance of 10 m and 15 m from the source of oscillation
Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 sec and the velocity of the wave is 300m/sec. What is […]
The phase difference between two points seperated by 0.8 m in a wave of frequency
The phase difference between two points seperated by 0.8 m in a wave of frequency 120 Hz is 0.5 π. The wave velocity is
Options
(a) 144 m/s (b) 256 m/s (c) 384 […]