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A brass scale of a barometer gives correct reading at 0°C. αBrass = 0.00002/ºC. The barometer reads 75 cm at 27°C. The atmospheric pressure at 0°C is
  • a)
    74.20 cm
  • b)
    74.62 cm
  • c)
    74.92 cm
  • d)
    75.04 cm
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A brass scale of a barometer gives correct reading at 0°C. α...
Suppose the correct barometer height at O°C is -l0, then
l0 + Δl = 75
or l0 + 75 x (αHg - αb) x 27 = 75
or
 l0 + 75 x (0.6 x 10-4 - 0.2 x 10-4) x 27 = 75
∴ l0 = 74.92 cm
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Community Answer
A brass scale of a barometer gives correct reading at 0°C. α...
The statement is incomplete and does not provide enough information to determine the accuracy of the brass scale of the barometer. The accuracy of a barometer scale depends on various factors such as calibration, design, and manufacturing quality. Additionally, the statement does not specify what the correct reading at 0 refers to, whether it is atmospheric pressure or another measurement.
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A brass scale of a barometer gives correct reading at 0°C. αBrass= 0.00002/ºC. The barometer reads75 cm at 27°C. The atmospheric pressure at 0°C isa)74.20 cmb)74.62 cmc)74.92 cmd)75.04 cmCorrect answer is option 'C'. Can you explain this answer?
Question Description
A brass scale of a barometer gives correct reading at 0°C. αBrass= 0.00002/ºC. The barometer reads75 cm at 27°C. The atmospheric pressure at 0°C isa)74.20 cmb)74.62 cmc)74.92 cmd)75.04 cmCorrect answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A brass scale of a barometer gives correct reading at 0°C. αBrass= 0.00002/ºC. The barometer reads75 cm at 27°C. The atmospheric pressure at 0°C isa)74.20 cmb)74.62 cmc)74.92 cmd)75.04 cmCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A brass scale of a barometer gives correct reading at 0°C. αBrass= 0.00002/ºC. The barometer reads75 cm at 27°C. The atmospheric pressure at 0°C isa)74.20 cmb)74.62 cmc)74.92 cmd)75.04 cmCorrect answer is option 'C'. Can you explain this answer?.
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