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Science
Class 8

CBSE · Class 8 · Science

Electricity: Magnetic and Heating Effects

Chapter 4CuriosityNCERT · Classes I–VIII · current textbook editions

4 worlds · 2 labs for this chapter.

Topics

Effects of current
- Magnetic field around a current
- Electromagnets
- Heating effect of electric current
Sources of electrical energy
- Voltaic cells
- Dry cells
- Rechargeable batteries
- Safe low-voltage investigation

Learning objectives

Explain how electric current can produce a magnetic or heating effect.

Worlds

Places to explore freely · 4 worlds

WorldElectromagnetsWind a coil on a nail to lift paper clips, then sort a scrap heap with a crane magnet you can switch off
WorldElectric CircuitsBend the wires yourself on a pegboard — bulbs, cells, switches and a current you can actually see moving
WorldMagnetismField lines you sweep out with a compass — bar magnets, a wire, a coil, an iron core, and the Earth, all computed, none drawn
WorldCircuits & Electric PowerLight lamps in a row and side by side, send 3 MW down a 132 kV line, and run a house through a power cut on its battery

Labs

Fit this chapter · 2 labs

LabElectric Current & CircuitsPhysics
LabElectrochemistry LabGalvanic cells

Practice

Questions for Class 8 Science, with worked answers, on screen or as a printed paper.

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