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Water rises to height of 5 cm in glass c...

Water rises to height of 5 cm in glass capillary tube . If the area of cross section of the tube is reduced to `((1)/(16))` th of the former value , the water rises to a height of

A

20 cm

B

30 cm

C

80 cm

D

40 cm

Text Solution

Verified by Experts

The correct Answer is:
A
` A_(2)=1/4A_(1)`
`pir_(2)^(2)=1/4A_(1)pir_(1)^(2)`
` r_(2) = (r_(1))/2`
`h _(2)r_(2)= h_(1)r_(1)`
`h_(2)=4xx2 = 8`
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