A barometer tube reads 76 cm of Hg. If the tube is gradually inclined at an angle of 30∘ with horizontal, then find the length of the mercury column in the barometer tube.
A
142cm
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B
152cm
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C
132cm
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D
122cm
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Solution
The correct option is B152cm We know that barometer is used to measure atmosphere pressure. Given, atmospheric pressure, Po=76cm of Hg ⇒h=76cm
When the tube is inclined, then the vertical height of the mercury column will remain the same as atmospheric pressure is the same.