Tardigrade
Tardigrade - CET NEET JEE Exam App
Exams
Login
Signup
Tardigrade
Question
Physics
A raindrop of radius 0.3 mm has a terminal velocity in air =1 m s- 1 . The viscous force on it is (Given the viscosity of the air is 18 × 10- 5 g cm- 1 s- 1 )
Q. A raindrop of radius 0.3 mm has a terminal velocity in air
=
1
m
s
−
1
. The viscous force on it is (Given the viscosity of the air is
18
×
1
0
−
5
g
c
m
−
1
s
−
1
)
1321
208
NTA Abhyas
NTA Abhyas 2020
Report Error
A
101.73
×
1
0
−
4
d
y
n
e
100%
B
101.73
×
1
0
−
5
d
y
n
e
0%
C
16.95
×
1
0
−
4
d
y
n
e
0%
D
16.95
×
1
0
−
5
d
y
n
e
0%
Solution:
F
=
6
π
η
r
v
=
6
×
3.14
×
(
18
×
(
10
)
−
5
)
×
0.03
×
100
=
101.73
×
1
0
−
4
d
y
n
e