A standing wave is represented by where Y and A are in millimetres, t is in seconds and x is in metres. The velocity of the wave is:
1. | 104 m/s |
2. | 1 m/s |
3. | 10–4 m/s |
4. | Not derivable from the above data |
Two progressive waves are represented by, \(y_1=5sin(200t-3.14x)\) and
\(y_2=10sin(200t-3.14x+\frac{\pi}{3})\) (\(x\) is in metres, and \(t\) is in seconds). Path difference between the two waves is:
1.
2.
3.
4.
Two organ pipes closed at one end produce 5 beats per second in fundamental mode. If the ratio of their lengths is 10:11, then their frequencies (in Hz) are:
1. | 55, 50 | 2. | 105, 100 |
3. | 75, 70 | 4. | 100, 95 |
If a travelling wave pulse is given by \(y=\frac{20}{4+(x+4 t)^2}~\text{m}\), then:
1. | the pulse is traveling along the negative x axis. |
2. | the speed of the pulse is \(4\) m/s. |
3. | the amplitude of the pulse is \(5\) m. |
4. | all of these. |
Two wires, A and B, of a musical instrument 'Sitar' produce 3 beats per second. If the tension of B is raised, the number of beats becomes 1 beat per second. If the frequency of A is 450 Hz, then the original frequency of B will be:
1. 447 Hz
2. 453 Hz
3. 449 Hz
4. 451 Hz
A cylindrical tube open at both ends has a fundamental frequency f0 in the air. The tube is dipped vertically in water such that half its length is inside water. The fundamental frequency of the air column now will be:
1.
2.
3.
4. 2
The maximum possible wavelength in an open organ pipe of length l is:
1. | l | 2. | 2l |
3. | 3l | 4. | 4l |
The equation of a stationary wave is given as where t is in seconds and x in centimetres. Which of the following is correct?
1. | Wavelength of the component waves is 10 cm. |
2. | The separation between a node and the nearest antinode is 2.5 cm. |
3. | Frequency of the component wave is 0.25 Hz. |
4. | All of these |
The equation of a travelling wave is given as , where t is in seconds and x in metres. The minimum distance between two particles oscillating in the same phase is:
1. 10 m
2. 5 m
3. 2 m
4. 1.5 m
Two sound waves given by the equations \(y=A\sin 122 \pi t\) and \(y=A\sin 128 \pi t\) pass through a point simultaneously. The number of beats per second is:
1. | \(6\) | 2. | \(5\) |
3. | \(4\) | 4. | \(3\) |