How Electric Circuits Work
Move beyond basic wiring diagrams to understand how charge, voltage, and energy behave in real-world loops. Learn to diagnose DC loads, master reactive components, control switching, and tame noisy signals.
Like Duolingo, but for How Electric Circuits Work. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
25 levels across 4 sections, about 50 minutes end to end, roughly 10 days at five minutes a day. It moves through Diagnosing and Predicting DC Loops, Energy Storage and Active Switching, Alternating Signals and Reactive Networks, and The Physical Reality Beneath Schematics. It assumes you already know the basics.
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Key ideas in How Electric Circuits Work
- Junctions cannot store charge, so total inflow always equals total outflow.
- Subtracting known outflow branches from the incoming supply yields the remaining branch current.
- Charge never bottlenecks or vanishes at a circuit node.
- A closed loop returns to the same electrical potential, making the round-trip net voltage zero.
- Voltage rises provided by power sources must equal the sum of voltage drops across loads.
- Kirchhoff's voltage law holds true for any complete loop regardless of branch complexity.
- Components in a single unbranched path experience the exact same continuous current.
- Swapping series positions leaves total path resistance and component voltage drops unchanged.
- Current does not get used up sequentially before reaching downstream components.
- A voltmeter needs high internal resistance to probe across points without diverting flow.
- An ammeter must be inserted into an open wire so the full loop current passes through it.
- Measuring current across a powered component creates an accidental short circuit.
- Current diverts almost entirely through the near-zero-resistance bypass wire.
- Bypassed components experience near-zero voltage drop and shut down immediately.
- Overall circuit resistance collapses, drawing dangerously high current from the power supply.
- A divider relies on equal current flowing down both series resistors.
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives How Electric Circuits Work the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
If 5 amps enter a three-way junction, and two outgoing branches take 2 amps and 1 amp, how much is in the third branch?
Get it right to open this lesson and 24 more in the app.
How to learn How Electric Circuits Work, step by step
Go in order. 25 short levels across 4 sections, about 50 minutes in all, five minutes a day.
- 1
Diagnosing and Predicting DC Loops
- Tracing Voltage and Current with Kirchhoff's Rules
- Managing Voltage Dividers and Load Effects
- 2
Energy Storage and Active Switching
- Capacitors in Transient and Filtering Circuits
- Inductors and Magnetic Transient Spikes
- Controlling Current with Diodes and Transistors
- 3
Alternating Signals and Reactive Networks
- Alternating Current and Complex Impedance
- Passive Filtering and Resonance
- 4
The Physical Reality Beneath Schematics
- Grounding, Parasitics, and Signal Return
4 sections · 8 units · 25 levels. Built to play, not to enroll.
Questions about How Electric Circuits Work
How do I learn How Electric Circuits Work?
Go in order: start with Diagnosing and Predicting DC Loops, then Energy Storage and Active Switching, then Alternating Signals and Reactive Networks, then The Physical Reality Beneath Schematics. On Tomo that's 25 short levels, about 50 minutes in all, played five minutes a day. Start free and play the first level in under a minute.
Is there a Duolingo-style app for How Electric Circuits Work?
Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. How Electric Circuits Work is one of its free courses, and you can type any other topic to get a course of your own.
Is the How Electric Circuits Work course free?
Yes. How Electric Circuits Work is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.
How long does it take to learn How Electric Circuits Work?
25 levels across 4 sections, about 50 minutes of play in total. It's built for five minutes a day, so you finish it a little at a time instead of all at once.
Do I need any background to start How Electric Circuits Work?
No. It's pitched at an intermediate level, so it starts where you are and builds up. If you can tap a phone, you can start.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
How Electric Circuits Work is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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