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Essential Math for Electrical Engineering, a free math course on Tomo

Essential Math for Electrical Engineering

Bridge the gap between pure mathematics and hands-on circuit reality before university lectures begin. Build confidence rearranging circuit equations, decoding sinusoidal waveforms, analyzing mechanical forces, and reporting experimental engineering data.

Like Duolingo, but for Essential Math for Electrical Engineering. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

21 levels across 3 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Working with Circuit Mathematics, Physical Forces and Material Realities, and Practical Analysis and Laboratory Reporting. It starts from scratch.

21 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Ohmie the Otter, the guide who teaches the Essential Math for Electrical Engineering course
Essential Math for Electrical Engineering
with Ohmie the Otter
21
Levels
3
Sections
5
Min/day
What you'll learn

Key ideas in Essential Math for Electrical Engineering

  • Treating an equation like a balance scale means whatever operation you perform on one side must be performed on the other
  • Multiplying both sides of P = V² / R by R moves R out of the denominator to give P · R = V²
  • Dividing both sides by P isolates resistance as R = V² / P
  • Substitution replaces an unknown variable in one formula with an equivalent expression from another circuit rule
  • Replacing voltage V in P = V · I with (I · R) yields P = (I · R) · I
  • Multiplying the two identical current factors combines them into I squared (I² · R)
  • In a series voltage divider, each resistor takes a fraction of the total voltage equal to its share of the total resistance
  • The total resistance is R₁ + R₂ = 10 Ω + 30 Ω = 40 Ω
  • Resistor R₂ represents 30/40 (or 3/4) of the total resistance, so it receives 3/4 of 12 V, which is 9 V
  • Ohm's law establishes that current equals voltage divided by resistance (I = V / R), meaning Amperes equal Volts per Ohm (V / Ω)
  • Carrying units through algebraic steps verifies whether an expression has the correct physical dimensions
  • A result with units of Volts × Ohms indicates an algebraic error, as multiplying voltage by resistance does not yield current (Amperes)
  • Dividing a fixed voltage by an extremely small resistance (approaching 0) produces a massive, potentially destructive current known as a short circuit
  • Dividing a fixed voltage by an infinitely large resistance produces a current of zero, representing an open circuit or physical break in the wire
  • Testing limits (R → 0 and R → ∞) reveals the physical operating boundaries of circuit equations
  • Instantaneous AC voltage corresponds to the vertical height (projection) of a rotating vector.
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives Essential Math for Electrical Engineering 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.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

Rearranging Your Circuit Formulas

If you multiply both sides of P = V² / R by R, what does your equation look like?

Get it right to open this lesson and 20 more in the app.

Course map

How to learn Essential Math for Electrical Engineering, step by step

Go in order. 21 short levels across 3 sections, about 42 minutes in all, five minutes a day.

  1. 1

    Working with Circuit Mathematics

    • Manipulating Circuit Formulas
    • Trigonometry and Alternating Signals
    • Interpreting Graphs and Waveforms
  2. 2

    Physical Forces and Material Realities

    • Forces, Torque, and Energy Conversion
    • Materials Science in Circuit Design
  3. 3

    Practical Analysis and Laboratory Reporting

    • Dimensional Analysis and Units
    • Measurement Uncertainty and Lab Reports

3 sections · 7 units · 21 levels. Built to play, not to enroll.

Questions

Questions about Essential Math for Electrical Engineering

  1. How do I learn Essential Math for Electrical Engineering?

    Go in order: start with Working with Circuit Mathematics, then Physical Forces and Material Realities, then Practical Analysis and Laboratory Reporting. On Tomo that's 21 short levels, about 42 minutes in all, played five minutes a day. Start free and play the first level in under a minute.

  2. Is there a Duolingo-style app for Essential Math for Electrical Engineering?

    Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. Essential Math for Electrical Engineering is one of its free courses, and you can type any other topic to get a course of your own.

  3. Is the Essential Math for Electrical Engineering course free?

    Yes. Essential Math for Electrical Engineering is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.

  4. How long does it take to learn Essential Math for Electrical Engineering?

    21 levels across 3 sections, about 42 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.

  5. Do I need any background to start Essential Math for Electrical Engineering?

    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.

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