1
TS EAMCET 2023 (Online) 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A straw of circular cross-section of radius $R$ and negligible thickness is dipped vertically into a liquid of surface tension $T$. If the contact angle between the liquid and the straw material is $53^{\circ}$. The force acting on the straw due to surface tension of the liquid is $\left(\cos 53^{\circ}=0.6\right)$
A
$\frac{12 \pi R T}{5}$
B
$\frac{6 \pi R T}{5}$
C
$\frac{4 \pi R T}{5}$
D
$\frac{3 \pi R T}{5}$
2
TS EAMCET 2023 (Online) 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A solid metal sphere released in a vertical liquid column has attained terminal velocity in the downward direction. The magnitudes of viscous force, buoyant force and gravitational force acting on it are $F_V, F_B$ and $F_W$ respectively. Then, the correct relation between them is
A
$F_B>F_V=F_W$
B
$F_W=F_V+F_B$
C
$F_B=F_W+F_V$
D
$F_V=F_B+F_W$
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