PHYSICS · 9 EXPLORATION STEPS

Self-induction and eddy currents

Why do two lamps behave differently after a few copper turns are added to the coil? Why can a lamp flash once more after the switch opens?

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Simulation: Self-induction and eddy currents

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01
Explore the apparatus
02
Self-induction when closing the circuit
03
Self-induction when opening the circuit
04
I–t graph
05
Change coils
06
Real apparatus
07
Eddy currents
08
Electromagnetic braking
09
Challenge

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Source references

Translated from Tongjiang Lab. The original content references PEP textbooks. These idealised models help explain principles; teachers can select them to suit their learning objectives.

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Original Chinese textbook, second compulsory elective volume · Chapter 2: Electromagnetic induction · Section 4: Mutual induction and self-induction
Original Chinese textbook, second compulsory elective volume · Chapter 2: Electromagnetic induction · Section 3: Eddy currents, electromagnetic braking and drives

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