Physics Units, Dimensions and Measurement Units Single Correct MCQ
Published on: September 12, 2026

SI unit of pressure is

A
Pascal
B
Dynes/cm^{2}
C
\(c\pi 7\) of Hg
D
Atmosphere

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Text Solution

Verified by Experts
The correct answer is:
Option A
The SI unit of pressure is the Pascal (symbol: $\text{Pa}$).

Explanation:
Pressure ($P$) is defined as the perpendicular force ($F$) applied per unit area ($A$):
$$P = \frac{F}{A}$$

In the International System of Units (SI):
  • The SI unit of force is the Newton ($\text{N}$).
  • The SI unit of area is the square meter ($\text{m}^2$).

Therefore, the SI unit of pressure is $\text{N/m}^2$, which is named Pascal (Pa) in honor of the physicist Blaise Pascal.
$$1\text{ Pa} = 1\text{ N/m}^2$$
Hence, the correct option is Option A.

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