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  9. Q78

UKPSC PCS 2025 · Question 78 of 150

Consider the following statements: 1. The coefficient of linear expansion has dimension K^-1. 2. The coefficient of volume expansion has dimension K^-1.

Science & Tech

  1. ABoth 1 and 2 are correctCorrect
  2. B1 is correct but 2 is wrong
  3. C2 is correct but 1 is wrong
  4. DBoth 1 and 2 are wrong

Answer: A. Both 1 and 2 are correct

Explanation

Both linear and volumetric thermal expansion coefficients have the dimension of inverse temperature (K^-1).

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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