Move from source charges and voltage into simple loops, power, branch behavior, and equivalent resistance without leaving the same compact electricity path.
Use this page when you want one beginner-friendly electricity story instead of separate field and circuit shelves. The path starts with how charges create fields and potential, carries that voltage idea into a simple loop, and then stays with how that same source-and-voltage story scales into power, branch behavior, and mixed-circuit reduction before you branch into electromagnetism.
Best first concepts
The topic page keeps these starts in their own compact row so the first screen is about orientation and next action, not stacked feature cards.
See how source-charge sign, distance, and superposition set the electric field at one probe, then watch a test charge turn that field into a force without changing the field itself.
Field and force
Strong first stop for getting into this topic without scanning the whole library.
Keep one battery and two resistors in view while current, voltage, resistance, Ohm's law, and the contrast between series and parallel all stay tied to one honest circuit.
Circuits and Ohm's law
Strong first stop for getting into this topic without scanning the whole library.
Specific learning goals
These goal cards stay authored and transparent. They reuse the current topic page, starter tracks, guided collections, concept bundles, and progress cues instead of adding a separate recommendation system on top of this branch.
Use the electricity topic route, the authored bridge lesson set, and the main electricity track when the field-to-voltage-to-circuit handoff should stay explicit.
Primary move
Open topic route
No saved progress yet inside Electricity.
Entry diagnostic
Start from the opening step
No saved diagnostic checks are available yet, so the opening step is still the best entry into the collection.
Reuses the guided collection entry for Electricity Bridge Lesson Set, with 0 of 2 probes already ready.
No saved progress yet inside Electricity.
Open the electricity topic route is the next guided collection step.
Electric Fields opens this track and sets up the rest of the path.
No saved progress yet for Electric Potential.
Use the electricity route, the existing electricity-to-magnetism bridge collection, and the magnetic starter track so the transition into electromagnetism stays bounded and transparent.
Primary move
Start Electricity
Electricity is the authored prerequisite for Magnetism. Electric Fields opens this track and sets up the rest of the path. Nothing is hard-gated here; this is simply the authored prep path.
Entry diagnostic
Start from the opening step
No saved diagnostic checks are available yet, so the opening step is still the best entry into the collection.
Reuses the guided collection entry for Electricity to Magnetism Bridge, with 0 of 2 probes already ready.
Recommended prep
Electricity is the authored prerequisite for Magnetism. Electric Fields opens this track and sets up the rest of the path.
No saved progress yet inside Electricity.
Reopen the electricity track in recap mode is the next guided collection step.
Magnetic Fields opens this track and sets up the rest of the path.
No saved progress yet for Maxwell's Equations Synthesis.
Grouped concept overview
Each group is authored in the topic catalog, but the actual concepts, progress badges, and track cues still come from the canonical concept metadata and shared progress model.
Group 01
Start with how source charges shape the field, turn that into potential, and then reuse voltage in one simple circuit before adding more structure.
看來源電荷的正負、距離與疊加如何決定探測點的電場，再觀察測試電荷如何把該電場轉成力而不改變電場本身。
Strong first stop for getting into this topic without scanning the whole library.
把一個電池與兩個電阻留在視野中，讓電流、電壓、電阻、歐姆定律，以及串並聯對比都綁在同一個誠實電路上。
Strong first stop for getting into this topic without scanning the whole library.
Group 02
Once the voltage story is stable, read power and accumulated energy, then move into branch behavior and mixed-circuit reduction.