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For a system in equilibrium the bulk modulus is always:
AExactly zero
BInfinite
CPositive
DNegative
Answer & Solution
Correct answer: C. Positive
1. More pressure means less volume.
2. The minus sign in the definition cancels that.
3. So B is always positive.
_Source: NCERT Class 11 Physics Part II, Chapter 9, Mechanical Properties of Solids._
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