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Energy

ICSE · Class 7 · Physics

Quick revision notes for Energy — ICSE Class 7 Physics. Key concepts, formulas, and definitions for last-minute revision.

45 questions40 flashcards5 concepts

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Key Topics to Revise

1

1. Work, Energy, and Units

  • Work is done only when a force moves a body in the direction of the force.
  • If no motion takes place, no work is done.
  • Energy is the capacity to do work.
2

2. Forms of Energy

  • Energy exists in several forms: mechanical, heat, light, chemical, sound, magnetic, electrical, and atomic energy.
  • Mechanical energy is the energy possessed by a body due to its state of rest or motion.
  • Heat energy is energy released when fuels such as coal, oil, wood, or gas burn.
3

3. Mechanical Energy: Potential and Kinetic

  • Mechanical energy is the sum of potential energy and kinetic energy.
  • Potential energy is the energy possessed by a body due to its state of rest or position.
  • Kinetic energy is the energy possessed by a body due to its state of motion.
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4. Conversion of Energy

  • Energy can change from one form to another.
  • In a steam engine, chemical energy of coal changes into heat energy of steam and then into mechanical energy.
  • In an electric motor or fan, electrical energy changes into mechanical energy.

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Full Notes

Key Concepts

Work done = Force × DistanceThe SI unit of workEnergy exists as mechanicalMechanical energy is the energy possessedPotential energy is the energy possessed

Frequently Asked Questions

What are the important topics in Energy for ICSE Class 7 Physics?
Key topics in Energy include Energy Concept Hierarchy and Overview, Complete Mind Map of Energy Chapter, Chapter 3 Energy — Complete Mind Map. These are the concepts ICSE Class 7 examiners draw on most — study them first, then practise related questions.
How to score full marks in Energy — ICSE Class 7 Physics?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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