Which one of the following is the usual unit of measurement for Air Pressure used in India?

Question

Question

This question was previously asked in

UPSC NDA-II (General Ability) Official Paper-I (Held On: 03 Sept, 2023)

Answer 1

The correct answer is Millibar.Key Points

The usual unit of measurement for air pressure used in India is Millibar.
- Centimeter: Centimeter is a unit of length and not used for measuring air pressure.
- Millibar: Millibar (mb) is the standard unit for measuring atmospheric pressure. In the context of weather and atmospheric conditions, millibars are commonly used globally. It's the preferred unit for expressing air pressure in meteorology, including in India.
- Milligram: Milligram is a unit of mass and is not applicable to measuring air pressure.
- Milliliter: Milliliter is a unit of volume and is not relevant for measuring air pressure.
Pressure is defined as the force exerted per unit area. It is a measure of how much force is applied over a given area.
The formula for pressure (p) is given by : P=F/A; where P is Pressure, F is force and A is area over which force is applied.
The SI (International System of Units) unit of pressure is the Pascal (Pa), which is equivalent to one Newton per square meter (N/m^2).
Other Units of Pressure:
- Atmosphere (atm): Standard atmospheric pressure at sea level is defined as 1 atmosphere. It is approximately equal to 101325 Pascals.
- Bar (bar): Another unit of pressure, equal to 100,000 Pascals.
- Millimeter of Mercury (mmHg) or Torr: Commonly used in measuring atmospheric pressure where 1 mmHg is approximately equal to 133.322 Pa.