Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 2

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A piece of cork is floating on water in a small tank. The cork oscillates up and down vertically when small ripples pass over the surface of the water. The velocity of the ripples being $0.21 {m s}^{- 1}$ , wavelength $15 mm$ and amplitude $5 mm$ , the maximum velocity of the piece of cork is

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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-1>Q 3

The frequency of a man's voice is

300 Hz

and its wavelength is

1 m

. If the wavelength of a child's voice is

1.5 m

, then the frequency of the child's voice is:

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 5

Sound waves from a tuning fork

F

reach a point

P

by two separate routes

F A P

and

F B P

(when

F B P

is greater than

F A P

by

12 cm

there is silence at

P

). If the difference is

24 cm

the sound becomes maximum at

P

but at

36 cm

there is silence again and so on. If the velocity of sound in air is

330 m s^{- 1},

the least frequency of tuning fork is:

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 6

When we clap our hands, the sound produced is best described by-
(Here

p

denotes the change in pressure from the equilibrium value.)

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 7

Equation of a progressive sound wave is

y = a \sin (400 π t - \frac{π x}{0.85})

where

x

in (metre),

t

(second), then frequency of wave is:

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 10

The equation of sound wave is $y = 0.0015 \sin (62.4 x + 316 t)$ . Find the wavelength of this wave

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 13

Velocity of a sound wave is

360 m s^{- 1}

and frequency is

50 Hz

, then path difference will be at the phase difference of

60 °

is:

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 16

Two points are located at a distance of

10 m

and

15 m

from the source of oscillation. The period of oscillation is

0.05 s

and the velocity of the wave is

300 m s^{- 1}

. What is the phase difference between the oscillations of two points ?

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 19

Two periodic waves of intensities

I_{1}

and

I_{2}

pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is :