Physical Quantity

Physical Quantity

• Physical Property and Chemical Property
• Intensive and Extensive Properties
• Definition – Physical Quantity
• Types of Physical Quantity

Need for Measurement

• Components of a measurement
• Relation between numerical value and unit

Units of Measurement

1. System of Units
2. SI system
   • Basic/Fundamental units
   • Dimensional Units
   • Derived Units
   • Prefixes for units
   • Interconversion of units – Unit Factors

Measuring Instruments

1. Features of measuring instruments
   • Least count
   • Precision
   • Accuracy
2. Significant Figures
   • Identifying Significant figures
   • Rounding up to significant digits
   • Addition and subtraction of significant figures
   • Multiplication and division of significant digits
   • Scientific Notations
   • Arithmetic operations involving Scientific notations

Dimensional Analysis

• Dimensions of Physical Quantities
• Dimensional Analysis
• Application of dimensional analysis

For JEE – Mains and Advanced

Errors in measurement

• Methods of measurement
• Error analysis for physical quantities pertaining to the following experiments: (To be studied with related topics)
  • Experiments based on using Vernier calipers and screw gauge (micrometer),
  • Determination of g using simple pendulum,
  • Young’s modulus – elasticity of the material,
  • Surface tension of water by capillary rise and effect of detergents.
  • Specific heat of a liquid using calorimeter,
  • focal length of a concave mirror and a convex lens using u-v method,
  • Speed of sound using resonance column,
  • Verification of Ohm’s law using voltmeter and ammeter, and
  • Specific resistance of the material of a wire using meter bridge and post office box.