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Revision Notes
Electricity and Magnetism — Revision Notes
ICSE · Class 7 · Physics
Electricity and Magnetism revision notes for ICSE Class 7 Physics: 4 topics in quick points. Part of the ICSE Class 7 Physics syllabus.
99 questions37 flashcards5 concepts
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Key Topics to Revise
1
Magnetism and Magnetic Properties
- The first magnet was discovered nearly 5000 years ago in Magnesia.
- The word magnet is derived from the town name Magnesia.
- A magnet attracts small pieces of iron.
2
Electromagnetism and Electromagnets
- Hans Christian Oersted discovered in 1819 that there is a magnetic field around every wire carrying an electric current.
- A current-carrying cylindrical coil behaves like a magnet.
- A cylindrical coil is called a solenoid.
3
Electric Bell
- An electric bell is a common application of an electromagnet.
- The main parts are a horse-shoe electromagnet, a soft iron armature, a hammer, a gong, a metallic springy strip, an adjusting screw, a switch or bell push, and a battery.
- The armature is fixed to the metallic springy strip.
4
Electric Cells and Batteries
- A cell is a source of electricity.
- A cell consists of a vessel with two metal rods called electrodes and a chemical substance called electrolyte.
- In a simple cell, the copper rod becomes the positive electrode or anode and the zinc rod becomes the negative electrode or cathode.
Get complete notes with diagrams and examples
Full NotesKey Concepts
A magnet attracts iron and hasLike poles repel and unlike polesThe space around a bar magnetA magnetic compass is a smallA wire carrying electric current produces
Frequently Asked Questions
What are the important topics in Electricity and Magnetism for ICSE Class 7 Physics?
Key topics in Electricity and Magnetism include Magnetism and Magnetic Properties, Electromagnetism and Electromagnets, Electric Bell, Electric Cells and Batteries. Study these first, then practise questions on each for Class 7 exams.
How should I revise Electricity and Magnetism for Class 7 exams?
Learn the core ideas first, then work through the 99 practice questions on Electricity and Magnetism. 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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