wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A mercury barometer is known to be defective. It contains a small quantity of air in the space above the mercury. When an accurate barometer reads 770 mm, the defective one reads 760 mm and when the accurate one reads 750 mm, the defective one reads 742 mm. The true atmospheric pressure when the defective barometer reads 750 mm is

A
68 cm of Hg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
79.88 cm of Hg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
75.88 cm of Hg
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
72.15 cm of Hg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 75.88 cm of Hg
pressureineachcase=actualpressureobservedpressurelengthineachcase=actuallengthobservedlengthAccordingtotheBoyleslaw10×(l076)=8(l074.2)=(P075)(l076)l0=83.2P0=75.88cm

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon