How Electric Circuits Work
Learn to steer electricity to power lights, buzzers, and everyday hardware. Discover how voltage pushes charge, why resistors prevent burnouts, and how to route power using series and parallel layouts.
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.
A short one: 12 levels across 2 sections, about 24 minutes end to end, roughly 5 days at five minutes a day. It moves through Making Current Flow and Directing and Diagnosing the Path. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in How Electric Circuits Work
- Electricity only flows and powers a component when there is a continuous, unbroken path from one terminal back to the other
- Connecting to only a single terminal does not allow electrical charge to move
- A component must sit along the closed conductive loop between both terminals to do work
- Voltage is the strength of the push provided by a power source
- Current is the actual rate or volume of charge flowing through the circuit
- A higher voltage pushes more charge through a given path
- LEDs are polarized components that act like one-way gates for electrical current
- An LED only illuminates when its positive lead connects toward the positive side of the power source
- Reversing the orientation of an LED blocks current flow and keeps the LED dark
- A short circuit occurs when current finds a low-resistance shortcut between terminals, bypassing the intended load
- Without a load to restrict the flow, current surges to dangerously high levels
- The unchecked current rapidly converts chemical energy into intense heat in the wire and battery
- A switch controls a circuit simply by physically connecting or separating conductive contacts
- Opening the switch creates a gap in the loop, halting current flow instantly
- Closing the switch bridges the gap and restores the continuous conductive loop
- Delicate components like LEDs have a strict ceiling on how much electrical current they can safely handle
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.
You hook a wire from a battery's positive terminal to a light bulb, leaving the other side unhooked. What happens?
Get it right to open this lesson and 11 more in the app.
How to learn How Electric Circuits Work, step by step
Go in order. 12 short levels across 2 sections, about 24 minutes in all, five minutes a day.
- 1
Making Current Flow
- The Closed Loop: Powering Your First Component
- Resistors: Protecting Components from Excess Current
- 2
Directing and Diagnosing the Path
- Series and Parallel: Dividing Voltage and Current
- Circuit Troubleshooting: Locating Breaks and Faults
2 sections · 4 units · 12 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 Making Current Flow, then Directing and Diagnosing the Path. On Tomo that's 12 short levels, about 24 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?
12 levels across 2 sections, about 24 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 a beginner 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 Bestie style: your friend who just gets it. 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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Start How Electric Circuits Work today.
Download Tomo, search How Electric Circuits Work, and play your first lesson in under a minute.