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  9. Q76

UKPSC PCS 2025 · Question 76 of 150

Bulk modulus for a perfectly rigid body is:

Science & Tech

  1. AInfiniteCorrect
  2. BZero
  3. CUnity
  4. DSome finite low value

Answer: A. Infinite

Explanation

A perfectly rigid body does not change volume under pressure, so its bulk modulus is infinite.

Source: UKPSC Combined Upper PCS Prelims 2025 GS (Paper-I) held 29-Jun-2025, Series-A (SDJ), via teachingninja.in; answers from UKPSC provisional answer key Series A (prepp.in)

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