- 1(current)
Q. No.Sound waves travel at \(350\) m/s through warm air and at \(3500\) m/s through brass. The wavelength of a \(700\) Hz acoustic wave as it enters brass from warm air:
| 1. | increase by a factor of \(20\). |
| 2. | increase by a factor of \(10\). |
| 3. | decrease by a factor of \(20\). |
| 4. | decrease by a factor of \(10\). |
Subtopic: Â Speed of Sound |
 79%
Level 2: 60%+
AIPMT - 2011
Hints
Links
Two strings \(A\) and \(B,\) made of the same material, are stretched by the same tension. The radius of string \(A\) is double of the radius of \(B.\) A transverse wave that travels on \(A\) with a speed \(v_A\) and on \(B\) with a speed \(v_B.\) The ratio of \(\frac{v_A}{v_B}\) is:
| 1. | \(\frac{1}{2}\) | 2. | \(2\) |
| 3. | \(\frac{1}{4}\) | 4. | \(4\) |
Subtopic: Â Speed of Sound |
 68%
Level 2: 60%+
Hints
The speed of sound in air at standard temperature and pressure is:
(Given the mass of \(1\) mole of air is \(29.0\times10^{-3}~\text{kg}\) and \(\gamma=7/5 \text)\)
1. \(240 ~\text{m/s}\)
2. \(331.5~\text{m/s}\)
3. \(384.5~\text{m/s}\)
4. \(280~\text{m/s}\)
Subtopic: Â Speed of Sound |
 80%
Level 1: 80%+
Hints
Links
The speed of sound in a medium depends on:
| 1. | the elastic property but not the inertial property |
| 2. | the inertial property but not the elastic property |
| 3. | both the elastic and inertial properties |
| 4. | neither the elastic property nor the inertial property |
Subtopic: Â Speed of Sound |
 74%
Level 2: 60%+
Hints
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.