Vibration

Q.

The sound is an example of ___.

1. magnetic wave

2. electrical wave

3. electromagnetic wave

4. mechanical wave

Q. Question 24
The townhall building is situated close to Boojho’s house. There is a clock on the top of the townhall building which rings the bell every hour. Boojho has noticed that the sound of the clock appears to be much clearer at night. Explain.

Q. A tabla is an example of a _________ instrument.

1. wind
2. percussion
3. stringed
4. (b) and (c) above.

Q. Question 18
Suppose a stick is struck against a frying pan in vacuum. Will the frying pan vibrate? Will we be able to hear the sound? Explain.

Q. Differentiate between musical sound and noise.
[3 marks]

Q. Sound is produced due to vibration of _______ in human beings.

1. larynx
2. vocal cords
3. pinna
4. ossicles

Q.

How do waves move through a medium?

Q. Sound is produced due to vibration of _______ in human beings.

1. vocal cords
2. ossicles
3. larynx
4. pinna

Q.

Why is sound a wave?

Q.

When a drum is beaten, a sound is heard due to:

1. Heating of the membrane

2. Freezing of the membrane

3. Vibration of the membrane

4. Both heating and vibration of the membrane

Q. For a sound wave travelling from east to west, the particles vibrate in ___ direction.

1. north-south
2. east-west
3. up-down
4. north east- south west

Q.

In which part of the ear are sound waves amplified?

1. Cochlea

2. Middle ear

3. Outer ear

4. Inner ear

Q. A wave transfers energy by actual transfer of matter from one place to another.

1. True
2. False

Q.

Sound waves are:

1. Mechanical waves.

2. Non-mechanical waves.

3. Zero-energy waves.

4. Electromagnetic waves.

Q.

Which of the following statements are correct regarding waves?

1. Waves are disturbances that can propagate through a medium.

2. Depending on nature of oscillation, waves can be longitudinal or transverse.

3. Waves transfer energy from one place to another.

4. Waves transfer matter from one place to another.

Q.

Sound is produced because of _______ of particle.

1. vibrations

2. rotations

3. charge

4. random motion

Q. Sound is produced in a flute due to the vibration of air column.

1. True

2. False

Q. In case of a wave propagating through a medium, particles oscillate at their mean positions to transfer energy.

1. True
2. False