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A vertical U tube has two limbs of uneq...

A vertical U tube has two limbs of unequal radii are 5 cm and 0.1 respectively . The tube is partly filled with mercury of density 13.6 `"g/cm"^(3)` and surface tension is 550 dyne /cm . Assume the two levels of the limbs is

A

zero

B

`1.1` cm

C

`1.61` cm

D

`0.4` cm

Text Solution

Verified by Experts

The correct Answer is:
D
`h_(2)-h_(1)=(2Tcostheta)/(rhog)(1/(r_(2))-1/r_(1))`
` = (2xx550 xx 1xx 4.9)/(13.6b xx 1800 xx 0.552)=0.4 ` cm
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NIKITA PUBLICATION-SURFACE TENSION-Multiple Choice Questions (Expression for surface tension )
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