A vessel, whose bottom has round holes with diameter of 0.1 mm, is filled with water. The maximum height to which the water can be filled without leakage is- (S.T of water =75dyne/cm,g=1000cm/s2)
A
100 cm
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B
75 cm
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C
50 cm
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D
30 cm
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Solution
The correct option is D 30 cm The water can be filled upto a height such that capillary rise does not take place within the holes.
The expression is given by, H=2Tcosθρgr
Substituting the values of the quantities,
T = 0.075 N/m
θ=0
ρ=103
g = 10
R = 0.05×10−3m
Evaluating the expression, gives us H = 0.3 m or 30 cm