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బేరోమీటర్లో ప్రధానంగా ఉపయోగించే ద్రవం-

  1. నీరు
  2. ఆల్కహాల్
  3. పాదరసం
  4. బేరోమీటర్ లోపల ద్రవం ఉండదు.

Answer (Detailed Solution Below)

Option 3 : పాదరసం
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Detailed Solution

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సరైన సమాధానం ఎంపిక 3) అంటే పాదరసం
 

భావన:

  • బారోమీటర్: ఒక బారోమీటర్ అనేది ఒక నిర్ధిష్ట వాతావరణంలో వాతావరణ పీడనాన్ని లెక్కించడానికి ఉపయోగించే పరికరం.
  • వాతావరణ పీడనం: ఇది భూమి ఉపరితలంపై యూనిట్ ఉపరితల ప్రాంతం యొక్క గాలి ద్వారా కలిగే పీడనం.
  • కేశనాళిక: ఉపరితల ఉద్రిక్తత ఫలితంగా కేశనాళికలో ద్రవం పైకి లేచి పడే సామర్థ్యం ఇది.
వివరణ:
  • పాదరసంను బారోమీటర్ లోపల ఉపయోగిస్తారు.
  • అధిక సాంద్రత కారణంగా ఇతర ద్రవాల కంటే పాదరసం ప్రాధాన్యత ఇవ్వబడుతుంది.
  • పాదరసం యొక్క అధిక సాంద్రత దానిని తక్కువగా విస్తరించడానికి మరియు తద్వారా వాతావరణ పీడనాన్ని కొలవడానికి సహేతుకమైన ఎత్తుకు పెరుగుతుంది.
Additional Information
  • నీరు మరియు ఆల్కహాల్, బారోమీటర్ లోపల ఉపయోగించినట్లయితే, తక్కువ సాంద్రత కారణంగా అదే పీడన వ్యత్యాసాన్ని కొలవడానికి పాదరసం బారోమీటర్ కంటే దాదాపు 13.6 రెట్లు పెద్ద బారోమీటర్ అవసరం అవుతుంది.
  • పాదరసం యొక్క భాష్పపీడనం కూడా తక్కువగా ఉంటుంది, అందువల్ల లెక్కించబడ్డ వాతావరణ పీడనానికి జోడించబడుతుంది, తద్వారా ఖచ్చితమైన కొలతఇవ్వబడుతుంది.
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