1
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

Water is flowing on a horizontal fixed surface such that its flow velocity varies with $$y$$ (vertical direction) as $$v=k\left(\frac{2 y^2}{a^2}-\frac{y^3}{a^3}\right)$$. If coefficient of viscosity for water is $$2 \eta$$. What will the shear stress between layers of water at $$y=a$$ ?

A
$$\frac{2 \eta k}{a}$$
B
$$\frac{\eta}{k a}$$
C
$$\frac{\eta a}{2 k}$$
D
None of these
2
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

A capillary tube is attached horizontally to a constant heat arrangement. If the radius of the capillary tube is increased by 25%, then the rate of flow of liquid will change nearly by

A
100%
B
112%
C
124%
D
144%
3
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

Two drops of equal radius (R) coalesce to form a bigger drop. What is the ratio of surface energy of bigger drop to smaller one?

A
2$$-$$1/3 : 1
B
22/3 : 1
C
1 : 1
D
21/2 : 1
BITSAT Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12