Question

Pressure cannot be measured in :

• A. $\mathrm{N}{\mathrm{m}}^{-2}$
• B. bar
• C. $\mathrm{Pa}$
• D. $\mathrm{kg}.\mathrm{wt}.$

Answer 1

The correct option is D

$\mathrm{kg}.\mathrm{wt}.$

Explanation

1. The perpendicular force per unit area, or the stress at a point within a confined fluid is called pressure

$Pressure=\frac{Force}{Area}$

$=N{m}^{-2}$

2. One pascal is a pressure of one newton per square meter.

3. The bar is a metric unit of pressure, but not part of the International System of Units.

$1bar=100kPa$

Therefore, the units of pressure are $\mathrm{bar},\mathrm{N}{\mathrm{m}}^{-2}$ and Pascal.

Hence, the correct option is (D).