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The two arms of a Verical U tube have in...

The two arms of a Verical U tube have internal radii of 0.4 cm and 0.8 cm respectively . The tube contains water . What is the difference in the surface levels of water in the two arms ? S.T of water `= 70 xx10^(-3)` N/m

A

`0.7`mm

B

`1.785` mm

C

`3.785` mm

D

5 mm

Text Solution

Verified by Experts

The correct Answer is:
B
`h = (2T cos theta )/(rrhog) ` For water cos `theta` = 1 , `rho` =1
` :. h_(1) -h_(2) =(2T)/g [1/(r_(1))-1/(r_(2))] `
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MARVEL PUBLICATION-SURFACE TENSION -MULTIPLE CHOICE QUESTIONS . (STANDARD LEVEL)
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