wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by 75×104 N force due to the weight of the liquid. If the surface tension of water is 6×102 N/m, the inner circumference of the capillary tube must be: (Take θ=0)

A
1.25×102 m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
0.50×102 m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
6.5×102 m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
12.5×102 m
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 12.5×102 m
Given: Weight of liquid column = Upward force due to surface tension
W=(2πr)×T
For water θ=0,
Inner circumference,
2πr=WT=75×1046×102=12.5×102 m

flag
Suggest Corrections
thumbs-up
39
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon