PhysicsFundamental ConceptNCTB পদার্থবিজ্ঞান অধ্যায় ১ (ভৌত রাশি ও পরিমাপ)
Physical Quantity
Bengali: ভৌত রাশি•Pronunciation: ফিজিক্যাল কোয়ান্টিটি•Symbol: Q
Standard Definition:
Any measurable property of a physical body or system that can be quantified by measurement.
📐 Mathematical Equation, Units & Dimensions
Defining Mathematical Equation
Standard SI Unit
Depends on nature of quantity(রাশির প্রকৃতির ওপর নির্ভরশীল)
Dimensional Analysis
CGS Unit
Varies
📖 Physical Concept & Comprehensive Explanation
Physical quantities are the core foundation of all laws and equations in physics. A physical quantity is represented by the product of a numerical value and a standard unit. They are divided into fundamental quantities (independent base measurements such as length, mass, and time) and derived quantities (combinations of base quantities such as velocity and force).
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Quick Memory Hook:7 SI Base units: Length (m), Mass (kg), Time (s), Current (A), Temp (K), Intensity (cd), Amount (mol)
🎯 High-Yield Revision Points
- ✓Any quantifiable natural property constitutes a physical quantity.
- ✓The SI system defines 7 fundamental base quantities.
- ✓Classified into scalar and vector quantities based on directional dependence.
Use Online Solver for Physical Quantity
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❓ Frequently Asked Exam Questions (FAQ)
Common questions in board and competitive entrance examinations
Q1: What is a Physical Quantity?
A physical quantity is a property of a material or system that can be quantified by measurement.
Q2: What is the difference between base and derived quantities?
Base quantities are independent fundamental standards, whereas derived quantities are defined algebraically in terms of base quantities.