What is the SI unit of pressure?
Show answer & explanation
Correct answer: C
Explanation
The correct answer to the question presented in the image is (Option 3) Pascal.
Here is a brief description of pressure and the other units listed in the options:
Pressure:
• Definition: The force acting per unit area is called pressure.
• Formula:
Pressure (P) = F/A
• SI Unit: Pascal (Pa). One Pascal is equal to one Newton per square meter (N/m²).
• Origin: It is named in honor of the renowned French scientist, Blaise Pascal.
Analysis of Other Options:
Option - Unit - Physical Quantity
Option 1 Ampere Electric Current
Option 2 Watt Power
Option 4 Newton Force
Some other important units from an examination perspective:
• Frequency: Hertz
• Potential Difference: Volt
• Resistance: Ohm
• Energy & Work: Joule
• Atmospheric Pressure: This is often measured in 'Bar' or 'Atmosphere' (atm).