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Physics
A capillary tube is immersed vertically in water and the height of the water column is x. When this arrangement is taken into a mine of depth d, the height of the water column is y. If R is the radius of earth, the ratio (x/y) is :
Q. A capillary tube is immersed vertically in water and the height of the water column is
x
. When this arrangement is taken into a mine of depth
d
, the height of the water column is
y
. If
R
is the radius of earth, the ratio
y
x
is :
3104
217
JEE Main
JEE Main 2014
Mechanical Properties of Fluids
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A
(
1
−
R
d
)
70%
B
(
1
−
R
2
d
)
22%
C
(
R
+
d
R
−
d
)
3%
D
(
R
−
d
R
+
d
)
5%
Solution:
height talances additional presence hence
ρ
g
s
x
=
ρ
g
depth
y
g
s
x
=
g
s
(
1
−
d
/
R
)
y
y
x
=
1
−
R
d