Class 8 Science Chapter 4 PDF: Electricity: Magnetic and Heating Effects (Curiosity)

Class 8 Science Chapter 4, Electricity: Magnetic and Heating Effects, follows Mohini and Aakarsh at a school science exhibition to investigate two major effects of electric current—magnetism and heat—and how cells and batteries generate electricity.

What Class 8 Science Chapter 4 Covers

4.1 Does an Electric Current Have a Magnetic Effect? uses compass-needle deflection near a current-carrying wire (Activities 4.1 to 4.4) to introduce the magnetic effect of electric current and how to wind and test an electromagnet.

4.2 Does a Current Carrying Wire Get Hot? investigates the heating effect of electric current (Activity 4.5), why heating elements glow in appliances, and electrical safety.

4.3 How Does a Battery Generate Electricity? starts from early voltaic cells and constructs a simple cell (Activity 4.6), explaining primary and rechargeable secondary batteries.

Exercises in Chapter 4

• Keep the curiosity alive end-of-chapter questions and reasoning exercises.
• Discover, design, and debate and Projects for hands-on investigation.

Read Class 8 Science Chapter 4 Online

More Chapters

• Previous: Chapter 3: Health: The Ultimate Treasure
• Next: Chapter 5: Exploring Forces
• Hindi medium: Class 8 Science Chapter 4 PDF in Hindi (Jigyasa)
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• Every book chapter by chapter: NCERT chapter wise PDF

FAQ

What is an electromagnet in Class 8 Science Chapter 4?
A temporary magnet made by passing an electric current through a coil of insulated wire wound around an iron core; its magnetism disappears when the current stops.

What are the two main effects of electric current studied in Chapter 4?
The magnetic effect of electric current (used in electromagnets) and the heating effect of electric current (used in heaters and irons).

Updated 2026–27 NCERT Class 8 Books & Chapter-Wise PDFs

Looking for all chapters and the latest 2026–27 NCF NCERT textbooks for Class 8? Open any chapter below to download its official PDF or read our Read Online & Notes study guide, or visit the complete NCERT Class 8 Books PDF (2026–27 Main Page) for all subjects or All NCERT Books PDF (Class 1 to 12).