Introduction to Waves

Q.

How does the sound travel?

Q.

What do you mean by Sound?

Q. In longitudinal waves, particles move in the direction to the propagation of the wave.

1. parallel
2. perpendicular
3. parabolic

Q.

A body repeating its motion after a certain interval of time is in_______ motion.

Q.

The correct statement is :

(a) Sound and light both require medium for propagation

(b) Sound can travel in vacuum, but light can not

(c) Sound needs medium, but light does not need medium for its propagation

(d) Sound and light both can travel in vacuum.

Q.

What is the definition of Wavefront?

Q. Which of these is not an example of mechanical wave?

1. Sound waves
2. Light waves
3. Seismic waves
4. Water waves

Q.

Which properties are common in all types of mechanical waves?

Q.

State true or false.
Similar to sound, light can also not travel in a vacuum.

1. True

2. False

Q. Which of these is an example of a transverse and non-mechanical wave?

1. Sound waves
2. Light waves
3. Seismic P waves
4. Ocean waves

Q. Explain how sound is produced in a school bell.

Q. The velocity of sound is $330\text{m/s}$ and the time period of the sound wave is $0.1\text{s}$. Calculate the wavelength of the sound wave.

1. $33\text{m}$
2. $330\text{m}$
3. $3\text{m}$
4. $0.3\text{m}$

Q.

Explain the characteristics of wave motion.

Q.

The particles in a wave are moving at the same speed as the wave.

1. True

2. False

Q. A continuous disturbance is created on the surface of water in a ripple tank with a small piece of cork floating on it. Describe the motion of the cork . What does the motion of the cork tell about the disturbance?

Q.

For a sound wave, angle of reflection is always______angle of incidence.

1. less than

2. greater than

3. equal to

4. twice the

Q.

Do Sound waves have mass?

Q. A wave transports energy and not matter. Justify this statement

Q. The maximum elevation in a displacement-time graph of a transverse wave is called a and maximum depression is called a .

1. compression
2. crest
3. trough
4. rarefaction

Q.

Represent a LONGITUDINAL WAVE graphically with the x-axis and y-axis labelled, and represent the crest, trough, compression and rarefaction.

Q.

Which of the following are not the characteristics of mechanical waves?

1. They transport only energy.
2. They need a medium to travel.
3. They propagate as particles in the medium exhibit to and fro motion.
4. They transport only matter.

Q.

In Dholak, Sound Is Produced Due To

Q.

Define longitudinal and transverse wave.

Q.

Mechanical oscillation of particles in a medium will produce:-

1. Force

2. Energy

3. Oscillation

4. Ventilation

Q. Which of the following are characteristics of both sound and light waves?

1. Both travels with the same speed
2. Both can travel through vacuum
3. Both obeys laws of reflection
4. Both are forms of energy

Q.

What is a wave made of?

Q. Which of these is an example of a transverse and non-mechanical wave?

Q.

Is sound louder underwater?

Q. What is mechanical wave?

Q. Percussion instruments are musical instruments that are played by

1. banging
2. shaking
3. both A and B
4. hitting