Measurements of physical quantities with examples

In the pursuance to understand the world around us, scientists seek to know the relationships between physical quantities that can be measured. Reliable measurements of physical quantities are the most important part of physics. In this chapter, we will try to understand different topics related to measurement and uncertainty.

• Types of physical quantities
• The international system of units
• Difference between scientific notation and significant figures
• Types of errors in measurement
• Difference between accuracy and precision
• Dimensional analysis in physics 
• Vernier caliper least count formula
• Screw Gauge least count formula
• Difference between screw gauge and vernier caliper
• Different measuring instruments and their uses
• Types of stop watch and their uses
• Volume measuring instruments
• Types of thermometers
• Current measuring instrument : Ammeter and galvanometer
• Voltage measuring instrument : Voltmeter