Question

SI unit of pressure is

• A. pascal
• B. atm
• C. torr
• D. newton

Hint:

Always remember: SI unit of pressure = Pascal = N/m\(^2\).

Answer 1

The Correct Option is A

Step 1: Definition of pressure.
Pressure = Force per unit area. \[ P = \frac{F}{A} \] Step 2: SI system units.
- Force (\(F\)) = Newton (N).
- Area (\(A\)) = \(m^2\).
Thus, \[ 1 \, \text{Pa} = 1 \, \frac{\text{N}}{m^2}. \] Step 3: Other units.
- 1 atm = \(1.013 \times 10^5\) Pa.
- 1 torr = \(\tfrac{1}{760}\) atm.
Final Answer: \[ \boxed{\text{pascal}} \]