TS EAMCET 5-Aug-2021 Shift 1 Question Paper

A. Viscous force acts on any spherical body moving in viscous fluid.
According to Stoke's law,
Viscous force (F)∝ Coefficient of viscosity (η)
∝ Radius of body (R)
∝ Velocity of body (v)
∴‌‌F∝ηRv
F=6πnRv
∴ Stokes' law is related with viscous drag
B. Turbulence is related with Reynold's number
If R<2000→ laminar flow
2000<R<3000→ transition flow (both laminar and turbulent)
R>3000→ Turbulent flow
C. Bernouli's principle According to this principle,
p+ρgh+‌

1

2

ρv2=‌ constant ‌
where, p is pressure energy per unit volume, ρgh is potential energy per unit volume and ‌

1

2

ρv2 is
kinetic energy per unit volume.
D. Pascal's law
In closed system, pressure remains same everywhere,
p1=p2
used in hydraulic lift.
Hence, A→ III, B → IV, C→ I and D→ II are correct.