🌈 Rainbow Mindmap of Physical Quantities and Measurement
Understanding physical quantities and measurement is the foundation of physics. Here's a colorful rainbow mindmap that simplifies the entire chapter into visual branches. This will help you revise faster, remember longer, and prepare better for IIT foundation-level exams.
🔴 1. Physical Quantities
- Definition: Measurable quantities
- Types:
- Fundamental Quantities: Length, Mass, Time, Temperature, Electic current, Amount of substance, Luminous intensity
- Derived Quantities: Speed, Volume, Density, etc.
- SI Units: Based on International System of Units
🟠2. Units of Measurement
- Fundamental Units vs Derived Units
- Examples:
- Speed → m/s
- Force → kg·m/s²
- SI vs CGS system
🟡 3. Measurement Tools & Devices
- Length: Ruler, Measuring Tape, Vernier Calipers
- Mass: Beam Balance, Digital Balance
- Time: Clock, Stopwatch
- Temperature: Thermometer
🟢 4. Accuracy & Least Count
- Accuracy: Closeness to actual value
- Precision: Repeatability
- Least Count: Smallest measurable value
- Errors: Human error, zero error, instrument error
🔵 5. Significant Figures
- Meaningful digits in measurement
- Rules for counting significant figures
- Used in rounding and scientific notation
🟣 6. Conversions of Units
- Between SI and CGS systems
- Metric conversion (km → m → cm → mm)
- Use of conversion factors
🟤 7. Real-Life Applications
- In science labs and experiments
- Construction and Engineering
- Medicine: Thermometers, weighing machines
- Transport: Speedometers, fuel calculation
🔔 Bonus Tip: Every quantity in physics is either measured or calculated — understanding units and tools is the key!
