Question

The SI unit of the viscosity is:
1. poise
2. centipoise
3. N s m^-2
4. none of the above

Answer 1

Correct Answer - Option 3 : N s m^-2

CONCEPT:

• Viscosity: The state of being sticky, thick, and semi-fluid inconsistency, due to internal friction is called viscosity.
  • The SI unit of viscosity is newton-second per square meter (N·s/m²).

EXPLANATION:

• The units of viscosity are poise, centipoise, m²/s, Newton-second per square meter, etc.
• The SI unit of viscosity is newton-second per square meter (N·s/m2).
• In the numerical, generally, viscosity is given in poise.
• We have to convert it into an SI unit.

1 N s m-2 = 10 poise or

1 poise = 1/10 N s m-2

• So the correct answer is option 3.