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Bulk Modulus

Bulk modulus ...

Question

Bulk modulus of an incompressible liquid is

A

Zero

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B

Infinity

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C

Unity

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D

Between Zero & Unity

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Solution

The correct option is B Infinity
We know, $\frac{P}{K} = - \frac{Δ V}{V}$
Bulk modulus, $K = \frac{- P V}{Δ V}$
For an incompressible liquid,
$Δ V$ (change in volume) $= 0$
So, for every value of pressure, putting $Δ V = 0$
$\Rightarrow K = \infty$ (infinity)

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, where symbols have their standard meaning.

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