MCQ
In stationary waves, distance between a node and its nearest antinode is $20 \mathrm{~cm}$. The phase difference between two particles having a separation of $60 \mathrm{~cm}$ will be
- AZero
- B$\pi / 2$
- C$\pi$
- ✓$3 \pi / 2$
✓
Answer
Correct option: D.
$3 \pi / 2$
$\frac{\lambda}{4}=20 \Rightarrow \lambda=80 \mathrm{~cm}, \text { also } \Delta \phi=\frac{\lambda}{2 \pi} \cdot \Delta x $
$\Rightarrow \Delta \phi=\frac{60}{80} \times 2 \pi=\frac{3 \pi}{2}$
$\Rightarrow \Delta \phi=\frac{60}{80} \times 2 \pi=\frac{3 \pi}{2}$
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
Solar radiation emitted by sun resembles that emitted by a black body at a temperature of $6000 \mathrm{~K}$. Maximum intensity is emitted at a wavelength of about $4800 \mathring A$. If the sun were to cool down from $6000 K$ to $3000 K$ then the peak intensity would occur at a wavelength
→A capacitor is connected to a cell of emf $E$ having some internal resistance $r$. The potential difference across the
→The maximum speed of a particle executing S.H.M. is $1 m / s$ and its maximum acceleration is $1.57 m / sec ^2$. The time period of the particle will be
→An inductor $L$ and a capacitor $C$ are connected in the circuit as shown in the figure. The frequency of the power supply is equal to the resonant frequency of the circuit. Which ammeter will read zero ampere
→Mass of earth has been determined through
$A$ is singing a note and at the same time $B$ is singing a note with exactly one $-$ eighth the frequency of the note of $A$. The energies of two sounds are equal, the amplitude of the note of $B$ is
→A body of $5 kg$ is moving with a velocity of $20 m / s$. If a force of $100 N$ is applied on it for $10 s$ in the same direction as its velocity, what will now be the velocity of the body
→A step index fibre has a relative refractive index of $0.88 \%$. What is the critical angle at the corecladding interface
→Density of ice is $\rho$ and that of water is $\sigma$. What will be the decrease in volume when a mass $M$ of ice melts
→The current inside a copper voltameter [Roorkee 1992]