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Three liquids of densities ( \rho _ { 1 } , \rho _ { 2 } ) and ( \rho _ { 3 } ) (with ( \rho _ { 1 } > \rho _ { 2 } > \rho _ { 3 } ) ), having the same value of surface tension ( T ), rise to the same height in three identical capillaries. The angles of contact ( \theta _ { 1 } , \theta _ { 2 } ) and ( \theta _ { 3 } ) obey

Options

A.2πr>θ1>θ2>θ3≥02 ^ { \frac { \pi } { r } } > \theta _ { 1 } > \theta _ { 2 } > \theta _ { 3 } \geq 0
B.0≤θ1<θ2<θ3<2π‾0 \leq \theta _ { 1 } < \theta _ { 2 } < \theta _ { 3 } < 2 ^ { \underline { \pi } }
C.2π‾<θ1<θ2<θ3<π2 ^ { \underline { \pi } } < \theta _ { 1 } \quad < \theta _ { 2 } \quad < \theta _ { 3 } \quad < \pi
D.π>θ1>θ2>θ3>2π‾\pi > \theta _ { 1 } > \theta _ { 2 } > \theta _ { 3 } > 2 ^ { \underline { \pi } }

Correct Answer

A. \( 2 ^ { \frac { \pi } { r } } > \theta { 1 } > \theta { 2 } > \theta { 3 } \geq 0 \)

Exam
NEET
Language
English
Year
2016
Difficulty
1/5
Section
Physics

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