Waves Test

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Waves Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

in the same medium transverse and longitudinal waves

A
travel with same speeds

B
travel changing transverse wave to longitudinal wave

C
travel changing longitudinal wave to transverse wave

D
travel with different speeds

Solution

Explanation:

As speed of transverse & longitudinal waves depend on different modulus of elasticity (Young's modulus, Bulk modulus, Modulus of Rigidity) of the medium.

So in the same medium transverse and longitudinal waves

travel with different speeds
Question 2
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The waves on the surface of water are of two kinds:.

A
sound waves and gravity waves

B
capillary waves and gravity waves

C
capillary waves and sound waves

D
seismic waves and cosmic waves

Solution

Explanation:

As capillary & gravity waves are elastic waves or mechanical waves which require medium for their propagation.

Hence they are using the elastic behaviour of water.

Hence

The waves on the surface of water are of two kinds:

capillary waves and gravity waves
Question 3
1 / -0

Travelling or progressive wave

A
does not move from one point of the medium to another

B
does not move from one point of the medium to any other

C
does not move from one point of the medium to all others

D
travels from one point of the medium to another

Solution

Explanation:

As progressive wave means a wave propagating in some onward direction in the medium
Question 4
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in longitudinal waves, the constituents of the medium

A
oscillate at 30^º to the direction of wave propagation

B
oscillate perpendicular to the direction of wave propagation

C
oscillate along the direction of wave propagation.

D
oscillate at 40^º to the direction of wave propagation

Solution

Explanation:

In longitudinal wave motion, medium particles oscillates or vibrates in same direction of wave propagation to produce compression & rarefaction in wave propagation.
Question 5
1 / -0

in transverse waves, the constituents of the medium

A
oscillate perpendicular to the direction of wave propagation

B
oscillate at 40^º to the direction of wave propagation

C
oscillate at 30^º to the direction of wave propagation

D
oscillate parallel to the direction of wave propagation

Solution

Explanation:

In transverse wave motion medium particles oscillates or vibrates in a direction perpendicular to the direction of wave propagation to form crest & trough in the wave motion.
Question 6
1 / -0

The quantity similar to extension or compression of the spring in sound wave propagation (air) is

A
the change in air particles

B
the change in air density

C
the change in air composition

D
the change in air humidity

Solution

Explanation:

As in air wave propagates in the form of compression (increase in density of air) and rarefaction (decrease in density of air).
Question 7
1 / -0

Matter waves are useful in

A
explaining gravitational phenomenon

B
explaining tidal wave phenomenon

C
explaining quantum mechanical phenomenon

D
explaining astronomical phenomenon

Solution

Explanation:

Matter waves are also termed as De Broglie waves because they were initially introduced by him. All matters behave like a wave (during motion) and in there propagation there is action of forces due to collision between the particles, some time torque also exists, hence all the matters waves were consider to be a helpful part for understanding quantum.
Question 8
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Electromagnetic waves are different from sound waves in that

A
they need no medium and are longitudinal

B
they need medium and are longitudinal

C
they need no medium and are transverse

D
they need medium and are transverse

Solution

Explanation:

Electromagnetic waves are transverse waves, they move perpendicular to the direction of propagation of wave ( the direction in which energy is transferred) and EM waves( Electromagnetic waves) can travel in vacuum, thus doesn't require any medium also.
Question 9
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When we make a mobile telephone call to a friend

A
the friend's mobile receives acoustic waves containing your audio

B
the friend's mobile generates possible electrical signals

C
the friend's mobile receives gravity waves containing your audio

D
the friend's mobile receives electromagnetic waves containing your audio

Solution

Explanation:

Because mobile communication is a space communication and in space communication basically electromagnetic waves are used (as carrier waves as in case of radio communication) because of the modulation ( frequency, amplitude) operations which can be performed on EM waves. Thus when our friend receives the call, he also receives EM waves which is the carrier of our audio signals.
Question 10
1 / -0

In wave propagation

A
there is no flow of matter and there is no movement of disturbance

B
there is flow of matter but there is movement of disturbance

C
there is flow of matter and there is no movement of disturbance

D
there is no flow of matter but there is movement of disturbance

Solution

Explanation:

because in wave propagation particles only moves in perodic motion, particles get collide with their neighbouring particles then transfer energy to them and comes back to their normal stage. Now next particle which gain energy get into excited state and starts moving periodically and get collide to next adjacent particle and so on. Thus in wave propagation particles only transfer their kinetic energy and momentum. Hence particles does not move therefore there is no flow of matter but there is movement of disturbance.

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Re-Attempt Weekly Quiz Competition

Waves Test - 1

Result

Waves Test - 1

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SHARING IS CARING

Question 1

travel with same speeds

travel changing transverse wave to longitudinal wave

travel changing longitudinal wave to transverse wave

travel with different speeds

Solution

Question 2

sound waves and gravity waves

capillary waves and gravity waves

capillary waves and sound waves

seismic waves and cosmic waves

Solution

Question 3

does not move from one point of the medium to another

does not move from one point of the medium to any other

does not move from one point of the medium to all others

travels from one point of the medium to another

Solution

Question 4

oscillate at 30º to the direction of wave propagation

oscillate perpendicular to the direction of wave propagation

oscillate along the direction of wave propagation.

oscillate at 40º to the direction of wave propagation

Solution

Question 5

oscillate perpendicular to the direction of wave propagation

oscillate at 40º to the direction of wave propagation

oscillate at 30º to the direction of wave propagation

oscillate parallel to the direction of wave propagation

Solution

Question 6

the change in air particles

the change in air density

the change in air composition

the change in air humidity

Solution

Question 7

explaining gravitational phenomenon

explaining tidal wave phenomenon

explaining quantum mechanical phenomenon

explaining astronomical phenomenon

Solution

Question 8

they need no medium and are longitudinal

they need medium and are longitudinal

they need no medium and are transverse

they need medium and are transverse

Solution

Question 9

the friend's mobile receives acoustic waves containing your audio

the friend's mobile generates possible electrical signals

the friend's mobile receives gravity waves containing your audio

the friend's mobile receives electromagnetic waves containing your audio

Solution

Question 10

there is no flow of matter and there is no movement of disturbance

there is flow of matter but there is movement of disturbance

there is flow of matter and there is no movement of disturbance

there is no flow of matter but there is movement of disturbance

Solution

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oscillate at 30^º to the direction of wave propagation

oscillate at 40^º to the direction of wave propagation

oscillate at 40^º to the direction of wave propagation

oscillate at 30^º to the direction of wave propagation