Electric Circuits
Build an intuitive and practical grasp of electrical circuits from the ground up. Master current, voltage, and circuit laws, simplify complex networks with proven theorems, and predict dynamic circuit behavior over time.
Like Duolingo, but for Electric Circuits. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
24 levels across 4 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through Making Sense of Electric Flow, Analyzing Interconnected Networks, Circuit Simplification Theorems, and Energy Storage and Dynamic Circuits. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in Electric Circuits
- Current is a continuous loop of moving charges, not a one-way delivery
- Breaking the loop at any point stops charge movement everywhere in that path
- A power source must receive charges back at its negative terminal to keep pushing them out
- Voltage is an electrical pressure difference between two distinct points, not an absolute charge level
- Because both of the bird's feet touch the same wire, the voltage difference between them is virtually zero
- Current only flows through an object when there is a difference in voltage across it to drive the charges
- Electrical power measures how quickly an element consumes or delivers energy
- Power is calculated by multiplying the voltage across the component by the current flowing through it (P = V × I)
- A low-voltage circuit carrying high current can transfer the exact same power as a high-voltage circuit carrying low current
- Loads (like resistors and charging batteries) drop voltage as current enters their positive terminal
- Sources (like discharging batteries) push current out of their positive terminal into the circuit
- The direction current moves relative to the plus and minus markings tells you whether an element feeds energy into the circuit or extracts it
- An ideal voltage source maintains its specified voltage across its terminals no matter how much or how little current the circuit demands
- The current drawn from an ideal voltage source is determined entirely by the rest of the connected circuit
- An ideal source never drops its voltage internally under heavy electrical load
- Current increases in direct proportion to voltage across a fixed resistor
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 Electric Circuits 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.
What happens to the electric charges if you cut a wire anywhere in a simple circuit loop?
Get it right to open this lesson and 23 more in the app.
Where Electric Circuits takes you
- 1
Making Sense of Electric Flow
- Voltage, Current, and Power
- Resistance and Flow Division
- 2
Analyzing Interconnected Networks
- Kirchhoff's Laws and Circuit Topology
- Systematic Analysis: Nodes and Meshes
- 3
Circuit Simplification Theorems
- Linearity, Superposition, and Transformations
- Thévenin, Norton, and Power Transfer
- 4
Energy Storage and Dynamic Circuits
- Capacitors and Inductors
- Transients and Step Response in RC and RL Circuits
4 sections · 8 units · 24 levels. Built to play, not to enroll.
You pick the voice
Electric Circuits is taught in the 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 Electric Circuits today.
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