HARD

11th West Bengal Board

IMPORTANT

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A whistling train approaches a junction. An observer standing at the junction observes the frequency to be $2.2 kHz$ and $1.8 kHz$ of the approaching and the receding train. Find the speed of the train in terms of $m s^{- 1}$ ( Speed of sound = $300 m s^{- 1}$ ).

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Important Questions on Waves

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 36

Sound waves of frequency

220 Hz

produce stationary waves in air. If the velocity of sound wave in air be

330 m s^{- 1}

, find the distance ( in terms of

cm

) between two consecutive anti nodes.

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 36

Sound waves of frequency

220 Hz

produce stationary waves in air. If the velocity of sound wave in air be

330 m s^{- 1}

, find the distance ( in terms of

cm

) between a node and the next anti node.

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 36

Sound waves of frequency

220 Hz

produce stationary waves in air. If the velocity of sound wave in air be

330 m s^{- 1}

, find the distance ( in terms of

cm

) between two consecutive nodes.

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 37

A sound wave of frequency

100 Hz

is incident normally on a rigid wall and gets reflected therefrom. How will the nodes and anti nodes be situated from the wall ? Velocity of sound =

340 m s^{- 1}

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 38

Two sound waves originating from the same source travel along different paths in the air and then meet at a point. If the source frequency be

1 kHz

and one path be

83 cm

longer than the other, what will be the nature of interference ? The speed of the sound in air =

332 m s^{- 1}

HARD

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 39

Two steel wires of equal length emit fundamental tones when stretched by

0.225 kg

and

0.256 kg

respectively. The ratio of the frequencies is

1 : 4

. Find the ratio of their diameters.

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 40

A wire is under tension

40 N

and the length between the bridges is

70 cm

. A

5 m

sample of that wire has its mass

1 g

. Deduce the speed of the transverse waves on the wire (in terms of

10^{2} m s^{- 1}

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 40

A wire is under tension

40 N

and the length between the bridges is

70 cm

. A

5 m

sample of that wire has its mass

1 g

. Deduce the fundamental frequency.

A whistling train approaches a junction. An observer standing at the junction observes the frequency to be 2.2 kHz and 1.8 kHz of the approaching and the receding train. Find the speed of the train in terms of m s-1( Speed of sound = 300 m s-1).

Important Questions on Waves

Learn and Prepare for any exam you want !

A whistling train approaches a junction. An observer standing at the junction observes the frequency to be $2.2 kHz$ and $1.8 kHz$ of the approaching and the receding train. Find the speed of the train in terms of $m s^{- 1}$ ( Speed of sound = $300 m s^{- 1}$ ).