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Two liquids A and B have \({\theta }_{\mathrm{A}}\) and \({\theta }_{\mathrm{B}}\) as contact angles in a capillary tube…

Q1

Two liquids A and B have \({\theta }_{\mathrm{A}}\) and \({\theta }_{\mathrm{B}}\) as contact angles in a capillary tube. If \(K=\cos {\theta }_{A}/\cos {\theta }_{B}\). then identify the correct statement:

[JEE Main 2025, 4 Apr (Shift 1)]

a

K is negative, then liquid A and liquid B have convex meniscus.

b

K is negative, then liquid A and liquid B have concave meniscus.

c

K is negative, then liquid A has concave meniscus and liquid B has convex meniscus

d

K is zero, then liquid A has convex meniscus and liquid B has concave meniscus.

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