EWT | Academic Question

Questions
Question (1)
QN0038582
  1. A progressive wave travelling along the positive -direction is represented by . Its snapshot at  is given in the figure.                                                                                     

For this wave, the phase  is :

  • (A)

  • (B)

     

  • (C)

    0

  • (D)

Correct Answer: B
Explanation:

At

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Question (2)
QN0038583

The equation  represents a wave with

  • (A)

    amplitude , frequency     

  • (B)

    amplitude , frequency 

  • (C)

    amplitude , frequency 

  • (D)

    it does not represent a wave motion

Correct Answer: B
Explanation:

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Question (3)
QN0038584

The equation of wave is given by

Where  and  are in  and  in . The speed of the wave is

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

From the equation  and

Speed of wave,

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Question (4)
QN0038585

The equation of plane progressive wave motion is . Velocity of the particle is

  • (A)

           

  • (B)

  • (C)

  • (D)

Correct Answer: D
Explanation:

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Question (5)
QN0038586

The equation  is expression for

  • (A)

    stationary wave of single frequency along -axis

  • (B)

    a simple harmonic motion

  • (C)

    a progressive wave of single frequency along -axis

  • (D)

    the resultant of two SHMs of slightly different frequencies

Correct Answer: C
Explanation:

The equation of progressive wave propagating in the positive direction of -axis is

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Question (6)
QN0038587

A transverse wave is represented by . For what value of the wavelength is the wave velocity equal to the maximum particle velocity?

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: C
Explanation:

Particle velocity,

wave velocity

i. e.,  But

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Question (7)
QN0038588

The rate of transfer of energy in a wave depends              

  • (A)

    directly on the square of the wave amplitude and square of the wave frequency

  • (B)

    directly on the square of the wave amplitude and root of the wave frequency

  • (C)

    directly on the wave amplitude and square of the wave frequency

  • (D)

    None of these

Correct Answer: A
Explanation:

The intensity of wave, , so  and .

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Question (8)
QN0038589

For a sinusoidal wave represented by  sin , for a given a, the factor determines the displacement of the wave of any position and at any instant is

  • (A)

    constant 

  • (B)

    angular velocity 

  • (C)

    time interval 

  • (D)

    phase 

Correct Answer: D
Explanation:

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Question (9)
QN0038590

When a sound wave of frequency  passes through a medium, the maximum displacement of a particle of the medium is . The maximum velocity of the particle is equal to

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: A
Explanation:

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Question (10)
QN0038591

The displacement  of a particle in a medium can be expressed as, . where  is in second and  in meter. The speed of the wave is

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

From equation,

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