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Energy — Revision Notes

ICSE · Class 7 · Physics

Energy revision notes for ICSE Class 7 Physics: 4 topics in quick points. Part of the ICSE Class 7 Physics syllabus.

45 questions40 flashcards6 formulas & key relations5 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.
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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.
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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 Work, Energy, and Units, Forms of Energy, Mechanical Energy: Potential and Kinetic, Conversion of Energy. Study these first, then practise questions on each for Class 7 exams.
How should I revise Energy for Class 7 exams?
Learn the core ideas first, then work through the 45 practice questions on Energy. Revise 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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All ICSE Class 7 Physics Revision Notes

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