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  9. Q7

UKPSC PCS 2010 · Question 7 of 138

‘Decibel’ is unit to measure

Science

  1. ASpeed of light
  2. BIntensity of light
  3. CIntensity of soundCorrect
  4. DRadioactive frequency

Answer: C. Intensity of sound

Explanation

The decibel measures intensity of sound.

Source: UKPSC Lower PCS Prelims 2010 (Combined Lower Subordinate Services Exam), held 2011

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