Height of a mercury column is given as 76 cm of Hg in a barometer. Find the height of the column of a liquid of density 1.2 g/cc would be neccessary to balance atmospheric pressure Given: Density of mercury = 13600 kg/m3
A
546.8 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
742.6 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
432.5 cm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
861.3 cm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is D 861.3 cm Let the height of the mercury column be h cm. Pressure corresponding to 76 cm height of mercury column = ρ×g×h = 13.6×g×76cm Pressure corresponding to height h = 1.2×g×hcm Equating them we get, 13.6×g×76cm = 1.2×g×hcm h = 861.3 cm