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One end a U-tube of unifrom bore (area A...

One end a U-tube of unifrom bore (area A) cpmtaining mercury is connected to sunction pump . Because of it the level of liquid of density `rho` falls in one limb. When the pump is removed, the restoring force in the other limb is

A

`2xrhoAg`

B

`xrhog`

C

`Arhog`

D

`xrhoAg`

Text Solution

Verified by Experts

(a) `:.` The force due to excess pressure = restoring force
Or `rhoghA`=restoring force
or `rhog(2x)A` = restoring force
`:.` Restoring force `=2rhogxxA`
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