Question

if M is the mass of water that rises in capillary tube of radius r,then mass of water which will rise in a capillary tube of radius 2r is ___​

Answer 1

Answer

Correct option is

C

2M

Height of liquid rise in capillary tube h=  

ρrg

2Tcosθ  

C

​

 

​

⇒h∝  

r

1

​

 

when radius becomes double height become half

∴h  

′

=  

2

h

​

 

Now , M=πr  

2

h×ρ

M  

′

=π(2r)  

2

(h/2)×ρ=2M

Answer 2

Answer:

Height of liquid rise in capillary tube h=ρrg2TcosθC⇒h∝r1

when radius becomes double height become half

∴h′=2h

Now , M=πr2h×ρ

M′=π(2r)2(h/2)×ρ=2M