If some gas is trapped above the mercury column in a Barometer during the measurement of atmospheric pressure, the height of the Hg column is observed to be h. Then:
(A) h > 76 cm (B) h < 76 cm (C) h = 76 cm (A) cannot be predicted.
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75 cm
The height of mercury column in a barometer in a Calcutta laboratory was recorded to be 75 cm
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Answer:
(B) h<76
Explanation:
Because, the air trapped above will give pressure downwards and the height will be reduced slightly
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