Question

In a capillary tube , water rises to a height of 4 cm If its cross section area were one forth , the water would have to rises a height of
A. 2 cm
B. 6 cm
C. 4 cm
D. 8 cm

Answer 1

Correct Answer - D
`A_(1)prop r_(1)^(2) and A_(2)prop r_(2)^(2)`
`((A_(1))/A_(2)) = ((r_(1))/(r_(2)))^(2)`
` h_(1)r_(1)=h_(2)r_(2)`