- 1(current)
Q. No.| 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 \(10\). |
\(4.0~\text{gm}\) of gas occupies \(22.4~\text{litres}\) at NTP. The specific heat capacity of the gas at a constant volume is \(5.0~\text{JK}^{-1}\text{mol}^{-1}.\) If the speed of sound in the gas at NTP is \(952~\text{ms}^{-1},\) then the molar heat capacity at constant pressure will be:
(\(R=8.31~\text{JK}^{-1}\text{mol}^{-1}\))
| 1. | \(8.0~\text{JK}^{-1}\text{mol}^{-1}\) | 2. | \(7.5~\text{JK}^{-1}\text{mol}^{-1}\) |
| 3. | \(7.0~\text{JK}^{-1}\text{mol}^{-1}\) | 4. | \(8.5~\text{JK}^{-1}\text{mol}^{-1}\) |
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. | \(4\) |
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. \(280~\text{m/s}\)
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 |
- 1(current)
Q. No.
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