Topic Details (Notes format)

Physical World and Measurement

Subject: General Science

Book: NCERT Science Class 11

Physics explains natural phenomena using fundamental principles.
- **Branches of Physics**:
- Classical (Mechanics, Thermodynamics).
- Modern (Quantum Mechanics, Relativity).
- **Need for Measurement**:
- SI Units for standardization.
- Fundamental and Derived Quantities.

**Possible Exam Questions:**
1. What are the fundamental principles of physics?
2. Why is measurement important in physics?
3. Differentiate between fundamental and derived quantities.
4. What is the importance of SI units?
5. How does classical physics differ from modern physics?

Practice Questions

What is the most abundant gas in the Sun?

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Which part of the cell is responsible for energy production?

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What is the unit of electric current?

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What is the approximate age of the Earth?

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Which law states that energy cannot be created or destroyed?

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What is the main component of the human skeleton?

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Which process converts glucose into energy in the human body?

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What is the main component of natural gas?

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Which process separates light into its component colors?

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What is the main function of the ozone layer?

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