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Physics · PYQ NEET UG 2017
हिन्दीThe bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'P', the fractional decrease in radius is
Correct answer · Option D
\( \frac{P}{3B} \)
Explanation
Bulk modulus \( B = \frac{P}{-\Delta V / V} \). For a sphere, \( V = \frac{4}{3}\pi r^3 \), so \( \frac{\Delta V}{V} = 3\frac{\Delta r}{r} \). Thus, fractional decrease in radius \( \frac{-\Delta r}{r} = \frac{P}{3B} \).
