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Limbs of a manometer consist of uniform ...

Limbs of a manometer consist of uniform capillary tubes of radi `'r_1'` and `'r_2'` respectively, are connected to pressures `p_1` and `p_2`, respectively: Given `r_2 lt r_1`. The level of the liquid (density=d, Surface tension =T) in the narrower tube stands at height 'h' above the broader tube. Then the correct pressure difference `(p_1 - p_2)` between the limbs of manometer is given by :

A

`hdg - 2T [1/(r_2) - 1/(r_1)]`

B

`hdg`

C

`hdg - T [1/(r_2) - 1/(r_1)]`

D

`hdg - 2T[1/(r_1) - 1/(r_2)]`

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