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    6.

    In a progressive wave, the particles of the medium:

    A

    move forward with the wave.

    B

    move backward with the wave.

    C

    oscillate about their mean positions.

    D

    remain stationary.

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    9.

    The equation of a cylindrical progressive wave is

    A

    y=asinωty = a\,\,\sin \,\,\omega t

    B

    y=asin(ωtkr)y = a\,\,\sin \left( {\omega t - kr} \right)

    C

    y=arsin(ωtkr)y = \frac{a}{{\sqrt r }}\sin \left( {\omega t - kr} \right)

    D

    y=arsin(ωtkr)y = \frac{a}{r}\sin \left( {\omega t - kr} \right)

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    10.

    A transverse wave of amplitude 0.5m0.5\,\,m and wavelength 1m1m and frequency 2Hz2\,\,Hz is propagating in a string in the negative xx-direction. The expression for this wave is

    A

    y(x,t)=0.5sin(2πx4πt)y\left( {x,t} \right) = 0.5\,\,\sin \left( {2\pi x - 4\pi t} \right)

    B

    y(x,t)=0.5cos(2πx+4πt)y\left( {x,t} \right) = 0.5\,\,\cos \left( {2\pi x + 4\pi t} \right)

    C

    y(x,t)=0.5sin(πx2πt)y\left( {x,t} \right) = 0.5\,\,\sin \left( {\pi x - 2\pi t} \right)

    D

    y(x,t)=0.5cos(2πx+2πt)y\left( {x,t} \right) = 0.5\,\,\cos \left( {2\pi x + 2\pi t} \right)

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