Write characteristics of a harmonic wave.

Important Questions on Progressive Harmonic Waves

HARD

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>QUESTIONS>Q 6

Taking the equation of a plane progressive wave as $y=a \sin \left[\frac{2\mathrm{\pi }}{\lambda }\left(vt-x\right)\right]$, write down the expression for the particle velocity. Show that the particle velocity at a point $=$ wave velocity $\times$ slope of displacement curve at that point. 

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>QUESTIONS>Q 7

What do you mean by 'intensity' of a wave? Write its unit. What is the relation between intensity of wave and amplitude of motion of the medium particles$?$

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>NUMERICALS>Q 1

The frequency of a radio transmission centre is 30 MHz. Find out the wavelength of the waves transmitted from the station.

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>NUMERICALS>Q 2

Ripples are being generated by a vibrator on the surface of the water. The distance between two consecutive crests is $3 \mathrm{cm}$. Ripples cover a distance of $25.2 \mathrm{cm}$ in $1.2 \mathrm{s}$. Calculate the wavelength, wave velocity and the frequency of the generated waves.

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>NUMERICALS>Q 3

A wave of frequency $250 \mathrm{Hz}$ travels with a speed of $4800 {\mathrm{ms}}^{-1}$ in iron. What will be its wavelength in iron ?

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>NUMERICALS>Q 3

A wave of frequency $250 \mathrm{Hz}$ travels with a speed of $4800 {\mathrm{ms}}^{-1}$ in iron. What will be its wavelength in air if its speed in air is $332 {\mathrm{ms}}^{-1}$?

MEDIUM

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>NUMERICALS>Q 4

The wavelength of a wave in a medium is $0.5 \mathrm{m}$. The phase difference between the oscillations produced at two points in the medium due to this wave is $\raisebox{1ex}{$\pi $}\!\left/ \!\raisebox{-1ex}{$5$}\right.$. Calculate the minimum distance between these two points.

EASY

11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 28 - Progressive Harmonic Waves>NUMERICALS>Q 5

The phase difference between the vibrations of two particles in a medium is $\raisebox{1ex}{$\pi $}\!\left/ \!\raisebox{-1ex}{$3$}\right.$. Find the wavelength of the wave if the distance between the particles is $10 \mathrm{cm}$.