MCQ
An open pipe of length $33\,cm$ resonates to a frequency of $1000\,Hz$ . The mode of vibration is: (velocity of sound $= 330\,m/s$ )
- AFundamental
- ✓The $2^{nd}$ harmonic
- CThe $3^{rd}$ harmonic
- DThe $4^{th}$ harmonic
✓
Answer
Correct option: B.
The $2^{nd}$ harmonic
b
As $\frac{V}{2 l}=\frac{330 \times 100}{2 \times 33}=500 H z$
As $\frac{V}{2 l}=\frac{330 \times 100}{2 \times 33}=500 H z$
In second harmonic frequency $=\frac{V}{l}=1000 H z$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
When a mass $m$ is attached to a spring, it normally extends by $0.2\, m$. The mass $m$ is given a slight addition extension and released, then its time period will be
→The specific heat relation for ideal gas is
A man is watching two trains, one leaving and the other coming with equal speed of $4\,m/s$. If they sound their whistles each of frequency $240\, Hz$, the number of beats per sec heard by man will be equal to (velocity of sound in air $= 320\, m/s$)
→A block of mass $m$ lying on a rough horizontal plane is acted upon by a horizontal force $P$ and another force $Q$ inclined an at an angle $\theta $ to the vertical. The minimum value of coefficient of friction between the block and the surface for which the block will remain in equilibrium is
→Latent heat of ice is:
The radius of a sphere is $(5.3 \pm 0.1) \,cm$. The percentage error in its volume is
→The force of gravitation is
Consider the situation shown in the figure. Uniform rod of length $L$ can rotate freely about the hinge $A$ in vertical plane. Pulleys and string are light and frictionless. If therod remains horizontal at rest when the system is released then the mass of the rod is :
→When a massive body suffers an elastic collision with a stationary light body, then massive body approximately comes to rest and light body-
When unit mass of water boils to become steam at $100\,^0C$, it absorbs $Q$ amount of heat. The densities of water and steam at $100\,^0C$ are $\rho_1$ and $\rho_2$ respectively and the atmospheric pressure is $p_0$. The increase in internal energy of the water is
→