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Waves Test - 45...

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  • Question 1
    4 / -1

    A micro-wave and an ultrasonic sound wave have the same wavelength. Their frequencies are in the ratio (approximately)

  • Question 2
    4 / -1

    A wave has velocity u in medium P and velocity 2u in medium Q. If the wave is incident in medium P at an angle of 30°, then the angle of refraction will be

  • Question 3
    4 / -1

    An observer standing near the sea shore observes 54 waves per minute. If the wavelength of the water wave is 10m then the velocity of water wave is

  • Question 4
    4 / -1

    If the frequency of human heart beat is 1.25 Hz, the number of heart beats in 1 minute is

  • Question 5
    4 / -1

    The speed of sound in a gas of density ρ at a pressure P is proportional to

  • Question 6
    4 / -1

    A progressive wave y = A sin (kx – ωt) is reflected by a rigid wall at x = 0. Then the reflected wave can be represented by

  • Question 7
    4 / -1

  • Question 8
    4 / -1

    A travelling wave passes a point of observation. At this point, the time interval between successive crests is 0.2 sec and

  • Question 9
    4 / -1

  • Question 10
    4 / -1

    A wave travelling along the x-axis is described by the equation y (x, t) = 0.005 cos (α x – βt). If the wavelength and the time period of the wave are 0.08 m and 2.0 s, respectively, then α and β in appropriate units are

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