Oscillations and Waves-Speed of a Wave (NEET Physics): Questions 4 - 7 of 9

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Question number: 4

» Oscillations and Waves » Speed of a Wave

MCQ▾

Question

A wave of frequency 400 Hz has velocity 360 m/sec. The distance between two nearest points 60° out of phase, is

Choices

Choice (4) Response

a.

15 cm

b.

12 cm

c.

0.6 cm

d.

60 cm

Question number: 5

» Oscillations and Waves » Speed of a Wave

Assertion-Reason▾

Assertion (Ꭺ)

When temperature remains constant, change in air pressure do not affect the speed of sound.

Reason (Ꭱ)

Speed of sound is proportional to the square root of pressure.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

Question number: 6

» Oscillations and Waves » Speed of a Wave

Assertion-Reason▾

Assertion (Ꭺ)

Sound travels faster during a clear sunny day than during a clear night.

Reason (Ꭱ)

The velocity of sound is directly proportional to the square of temperature of the medium.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

Question number: 7

» Oscillations and Waves » Speed of a Wave

MCQ▾

Question

P, Q and R are three particles of a medium which lie on the x-axis. A sine wave of wavelength λ is travelling through the medium in the x -direction. P and R always have the same speed, while P and Q always have the same velocity. The minimum distance between –

(1) P and R is λ

(2) P and Q is λ2

(3) Q and R is λ2

(4) P and R is λ2

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

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