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Two vertical parallel glass plates , sep...

Two vertical parallel glass plates , separated by 0.5 mm, are kept in water . The surface tension of water is `7 xx 10^(-2)` N/m . How high will the water rise between the plates ? (use g = `10 "m/s"^(2)`)

A

`1.4` cm

B

2 cm

C

`2.8` cm

D

`3.5` cm

Text Solution

Verified by Experts

The correct Answer is:
C
` T = (rhrhog)/(2 cos theta) " " :. h = (2Tcos theta)/(rrhog)`
In this case, `cos theta =1, r = d = 0.5 xx 10^(-3) , rho = 10^(3) kg//m^(3) `
`:. h= 2.8` cm
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