At nodes in stationary waves - Vidyadip

MCQ

At nodes in stationary waves

✓
Change in pressure and density are maximum
B
Change in pressure and density are minimum
C
Strain is zero
D
Energy is minimum

✓

Answer

Correct option: A.

Change in pressure and density are maximum

a
(a) In a longitudinal standing wave, such as in an organ pipe, there are fixed locations in the pipe where molecules oscillate back and forth at maximum amplitude, but there is no variation in $pressure- the$ density remains constant; this is a pressure node. At $1 / 4$ wavelength away from this node there is a pressure antinode, where the density alternates from high to low, with corresponding alternations in pressure. At the center of this antinode there is no particle motion, but particles on either side alternately move toward and away from the centre

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

If the operating potential of an $X-$ ray tube is $50 kV$, the velocity of $X-$ rays coming out of itis

Parallel rays are incident on a transparent sphere along its one diameter. After refrection these rays converge at the other end of this diameter the refractive index of the sphere is

A plane mirror reflecting a ray of incident light is rotated through an angle $\theta $ about an axis through the point of incidence in the plane of the mirror perpendicular to the plane of incidence, then

A physical quantity $\vec{S}$ is defined as $\vec{S}=(\vec{E} \times \vec{B}) / \mu_0$, where $\vec{E}$ is electric field, $\vec{B}$ is magnetic field and $\mu_0$ is the permeability of free space. The dimensions of $\vec{S}$ are the same as the dimensions of which of the following quantity (ies)?

$(A)$ $\frac{\text { Energy }}{\text { charge } \times \text { current }}$

$(B)$ $\frac{\text { Force }}{\text { Length } \times \text { Time }}$

$(C)$ $\frac{\text { Energy }}{\text { Volume }}$

$(D)$ $\frac{\text { Power }}{\text { Area }}$

Two persons $A$ and $B$, each carrying a source of sound of frequency $n$, are standing a few metres apart in a quiet field. $A$ starts moving towards $B$ with a speed $u$. If $v$ is the speed of sound, the number of beats heard per second by $A$ will be

When photon of energy $3.8 \,eV$ falls on metallic surface of work function $2.8 \,eV$, then the kinetic energy of emitted electrons are .......... $eV$

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string at that instant is

The isothermal elasticity of a gas is equal to

A step-down transformer is connected to $2400 \,volts$ line and $80$ amperes of current is found to flow in output load. The ratio of the turns in primary and secondary coil is $20 : 1$. If transformer efficiency is $100\%$, then the current flowing in primary coil will be.....$A$

If in a plano-convex lens, the radius of curvature of the convex surface is $10 cm$ and the focal length of the lens is $30 cm,$ then the refractive index of the material of lens will be