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Elias Bansal
Asked: 2022-11-07T10:09:29+05:30 In:

A stone in hung in air from a wire which is stretched over a sonometer . The bridges of the sonometer are `40 cm` apart when the wire is in unison with a tuning fork of frequency `256 Hz`. When the stone is completely immersed in water , the length between the bridges is `22 cm` for re – establishing unison . The specific gravity of the material of the stone is
A. 0.767
B. 1.38
C. 0.983
D. 9.23

A stone in hung in air from a wire which is stretched over a sonometer . The bridges of the sonometer are `40 cm` apart when the wire is in unison with a tuning fork of frequency `256 Hz`. When the stone is completely immersed in water , the length between the bridges is `22 cm` for re – establishing unison . The specific gravity of the material of the stone is
A. 0.767
B. 1.38
C. 0.983
D. 9.23
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1 Answer

  1. Correct Answer – B
    `T_=Kl_1^2 ” and ” T_2=Kl_2^2`
    By definition of specific gravity
    `therefore (T_1)/(T_1-T_2) = (l_1^2)/(l_1^2-l_2^2) = ((40)^2)/((40)^2-(22)^2)=1.38`

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