Question

If a liquid rises to the same height in two capillaries of the same material at the same temperature
a) The weight of liquid in both capillaries must be equal
b) The radius of meniscus must be equal
c) The capillaries must be cylindrical and vertical
d) The hydrostatic pressure at the base of capillaries must be the same

• A. a and c are true
• B. b and d are true
• C. a and b are true
• D. b and c are true

Answer 1

Answer: (B)

b and d are true

$h=\frac{2Tcos\Theta }{rPg}$
as h for both is same
$r=r_e$
$P=p_0+hpg$
as P for both is same and h is same.
$p_0{r}_e$ pressure at bottom of capillary has to be same.