Electricity: Circuits and their Components — Chapter Summary
CBSE · Class 7 · Science
Summary of Electricity: Circuits and their Components for CBSE Class 7 Science. Part of the CBSE Class 7 Science syllabus.
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Overview
Electricity can be used only when there is a complete path for current to flow. A portable electric cell has two terminals, and one or more cells can be combined into a battery to supply more energy for a longer time. A torchlight works because the cell, lamp, wires, and switch form a circuit. Incan
Key Concepts
An electric cell is a portable
An electric cell is a portable source of electrical energy. It has two terminals: a positive terminal with a metal cap and a negative terminal with a
A battery is a combination
A battery is a combination of two or more cells connected so that the positive terminal of one cell touches the negative terminal of the next. The ter
An incandescent lamp has a thin
An incandescent lamp has a thin filament inside a glass bulb. The filament is attached to two thicker wires that form the terminals of the lamp. The l
An LED has no filament
An LED has no filament. It has a longer wire as the positive terminal and a shorter wire as the negative terminal. Current passes through it in only o
A circuit is a complete path
A circuit is a complete path through which electric current flows. The lamp glows only when both terminals of the lamp are connected to the two termin
Learning Objectives
- Understand the parts of a simple electric circuit
- Identify the terminals of an electric cell and a battery
- Differentiate between an incandescent lamp and an LED
- Explain how a switch opens and closes a circuit
- Draw and read simple circuit diagrams using symbols
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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