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

Which gas is most abundant in Earth’s atmosphere?

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What is the unit of force in the SI system?

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Which organ regulates blood sugar levels in the human body?

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Which organ is responsible for detoxifying harmful substances in the human body?

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Which vitamin is responsible for blood clotting?

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Which part of the cell is responsible for energy production?

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Which process describes the splitting of a nucleus into smaller nuclei?

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What type of electromagnetic radiation has the longest wavelength?

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Which part of the cell contains the genetic material?

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What is the primary source of energy for life on Earth?

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