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An air column closed in a tube sealed at...

An air column closed in a tube sealed at one end by a Hg column having height h. When the tube is placed with open end down, the height of the air column Iis `l_(1)`. If the tube is turned so that its open end is at the top, the height of the air column is `l_(2)`. What is the atmospheric pressure `(P_0)`.

A

`P_(0) = (h(l_1 + l_2))/((l_2 - l_1)) cm` of Hg

B

`P_(0) = (h(l_1 - l_2))/((l_2 + l_1)) cm` of Hg

C

76 cm of Hg

D

`P_(0) = (h(l_1 + l_2))/((l_1 - l_2)) cm` of Hg

Text Solution

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The correct Answer is:
D
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