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Two harmonic waves travelling in the same medium have frequency in the ratio $1 : 2$ and intensity in the ratio $1 : 36$ . Their amplitude ratio is

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Important Questions on Waves

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Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

If the speed of wave is

250 m / s

and its wavelength is

50 cm

then the frequency will be:

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

The frequency of radio waves from a certain radio station is

600 KHz

. Its wavelength is

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

The velocity of sound wave in a given medium is

V

when its frequency is

ν

. The velocity, when the frequency changes to

5 ν

is :

MEDIUM

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

The given graph shows the displacement versus time relation for a disturbance travelling with velocity $1500 m / s$ . The wavelength of the disturbance will be

Question Image

HARD

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

A ball is moving uniformly in a circular path of radius

1 m

with a time period of

1.5 s

. If the ball is suddenly stopped at

t = 8.3 s,

the magnitude of the displacement of the ball with respect to its position at

t = 0 s

is closest to:

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

If the speed of wave is

350 m / s

and its wavelength is

100 cm

then the frequency of the wave will be

MEDIUM

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

Consider the following statements and select the correct alternative: Statement (A): The frequency of the sound wave whose wave length is

1.5 cm

with speed

339 m / s

22600 Hz

. Statement (B): The given sound is audible to human beings.

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

A progressive wave travelling along the positive

x -

direction is represented by

y (x, t) = A s i n (k x - ω t + ϕ)

. Its snapshot at

t = 0

is given in the figure.
Question Image

For this wave, the phase

ϕ

is:

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

On an average, a human heart is found to beat

72

times a minute. Its frequency and period are

HARD

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

A point particle is acted upon by a restoring force

- k x^{3} .

The time period of oscillation is

T

when the amplitude is

A .

The time period for an amplitude

2 A

will be:

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

The speed of a wave in a medium is

760 {ms}^{- 1}

.If

3600

waves are passing through a point in the medium in

2

minutes then its wavelength is

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

A simple wave motion is represented by $y = 5 (\sin 4 π t + \sqrt{3} \cos 4 π t)$ . Its amplitude is

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Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

A travelling harmonic wave is represented by the equation

y (x, t) = 10^{- 3} \sin (50 t + 2 x),

where

x

and

y

are in meter and

t

is in seconds. Which of the following is a correct statement about the wave?

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Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

When sound is refracted from air to water, which of the following will remain unchanged?

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Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

A transverse wave of frequency

500 Hz

and speed

100 m s^{- 1}

is travelling in the positive,

x

direction on a long string. A time

t = 0 s

the displacements at

x = 0.0 m

and at

x = 0.25 m

are

0.0 m

and

0.02 m,

respectively. The displacement at

x = 0.2 m

t = 5 \times 10^{4} s

is,

MEDIUM

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

The driver of bus approaching a big wall notices that the frequency of his bus's horn changes from

420 Hz

490 Hz

when he hears it after it gets reflected from the wall. Find the speed of the bus if speed of the sound is

330 {ms}^{- 1}

MEDIUM

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

Assume that the displacement

(s)

of air is proportional to the pressure difference

(Δ p)

created by a sound wave. Displacement

(s)

further depends on the speed of sound

(v)

, density of air

(ρ)

and the frequency

(f)

. If

Δ p = 10 Pa, n = 300 m s^{- 1}, p = 1 kg m^{- 3}

and

f = 1000 Hz

, then

s

will be of the order of (take the multiplicative constant to be

1

)

MEDIUM

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

What are acoustically measurable quantities related to pitch and loudness?

MEDIUM

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

A transverse wave travels on a taut steel wire with a velocity of

v

when tension in it is

2.06 \times 10^{4} N .

When the tension is changed to

T,

the velocity changed to

\frac{v}{2} .

The value of

T

is close to:

EASY

Physics>Oscillations and Waves>Waves>Transverse and Longitudinal waves

The figure below shows pressure variation in two different sound waves in air with time at a given position. Both the figures are drawn to the same scale.

Question Image

Which of the following statement is true?

Two harmonic waves travelling in the same medium have frequency in the ratio 1:2 and intensity in the ratio 1:36. Their amplitude ratio is

Important Questions on Waves

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Two harmonic waves travelling in the same medium have frequency in the ratio $1 : 2$ and intensity in the ratio $1 : 36$ . Their amplitude ratio is