The lower end of a capillary tube is dipped into water and it is seen that the water rises through 7.5 cm in capillary tube. What would be the radius of capillary tube, if surface tension of water is 
? The contact angle between water and glass is 
and 
.
Text Solution
Verified by ExpertsThe correct answer is:
D
Given, height raised by liquid,
Surface tension, 
and contact angle, 
As, 
where, 
density of water 
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