Electromagnetic field

Content and key concepts

This chapter links observed phenomena, physical models, and mathematical laws, first form a qualitative picture, then explore the relationships in interactive models.
GEF · Grade 9
PIF · Baseline
theory + model
15
Pages in this chapter
Three meaningful routes: concepts, laws, and model research.
15.1
Electromagnetic induction
Magnetic flux current
15.2
Switch electromagnetic field
Mutual creation of electric and magnetic fields
15.3
Electromagnetic waves
Radio, light and a single spectrum
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Study route
15.1 Electromagnetic induction
The change in the magnetic field that cuts through the circuit creates an induction current. The current direction is such that its field is opposed to the cause of the change.
15.2 Changing electromagnetic field
- A changing magnetic field creates a vortex electric field, and a changing electrical field is magnetic, and together they form a single electromagnetic field.
15.3 Electromagnetic waves
- The electromagnetic wave consists of mutually perpendicular fluctuations of the electric and magnetic fields and can spread in a vacuum.
Basis of contents:
The federal work programme on physics, the GEF OSL/GS and the thematic sequence of popular school lines are written specifically for Alterna and does not reproduce textbooks.