Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 25

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Stationary wave is represented by $y = A \sin (100 t) \cos (0.01 x)$ , where $y$ and $A$ are in $mm, t$ in sec, and $x$ in $m$ . The velocity of the wave -

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Important Questions on Wave Motion on a String

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 26

A wave represented by the equation

y = a

\cos

(k x - ω t)

is superposed with another wave to form a stationary wave such that the point

x = 0

is a node. The equation for other wave is :

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 27

A stretched sonometer wire resonates at a frequency of

350 Hz

and at the next higher frequency of

420 Hz

. The fundamental frequency of this wire is

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 29

The equation of a wave is represented by $y = 10^{- 4} \sin (100 t - \frac{π x}{10}) m$ , where $x$ and $y$ are in $meter$ and $t$ in $second$ , then the velocity of the wave will be

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 31

A wave travelling in positive

X

-direction with

A = 0.2 m

has a velocity of

360 m / \sec .

if

λ = 60 m,

then correct expression for the wave is:

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 32

Vibrations of rope tied by two rigid ends are shown by the equation

y = \cos 2 π t \sin 2 π x

, then the minimum length of the rope will be

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 33

Two waves of intensities ratio are

9 : 1

, then the ratio of their resultant's maximum and minimum intensities will be

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 35

A wave

y = a \sin (ω t - k x)

on a string meets with another wave producing a node at

x = 0 .

Then the equation of the unknown wave is-

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-2>Q 39

Two sinusoidal waves with the same wavelengths and amplitudes travel in opposite directions along a string with a speed of

10 m s^{- 1}

. If the minimum time interval between two instants when the string is flat is

0.5 s

, the wavelength of the waves is