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A glass capillary tube (closed from tap) of inner diameter `0.28mm` is lowered vertically into water in a vessel. The pressure in the capillary tube so that water level in the tube is same as that in the vessel is `N//m^(2)` is (surface tension of water `=0.7N//m` and atmospheric pressure `=10^(5)N//m^(2)`.
A. `10^(3)`
B. `99xx10^(3)`
C. `100xx10^(3)`
D. `101xx10^(3)`

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Correct Answer - D
`p=(2T)/(r )+p_(0)`
`=(2xx0.7)/(0.14xx10^(-3))+10^(5)`
`=1.01xx10^(5) N//m^(2)`.

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