Printable worksheets

Twelve problems a sheet, on paper, with an answer key that prints on its own page and shows the working for every problem. Print one for yourself, or hand them out to a class and keep the keys. New sheet draws another twelve whenever you want them, and the sheet number stays in the link so the same sheet can be printed again. Free, no sign-up, printed from your own browser.

• Ohm's law worksheet

  Volts, amps, ohms and watts — every rearrangement, twelve at a time.

• Voltage drop worksheet

  Drop, percent, and how far a run can go — single- and three-phase.

• Series and parallel worksheet

  Totals, combinations, dividers and branch currents.

• Trade math worksheet

  Fractions, sixteenths, mm and inches, percent, diagonals and circles.

• Motor control worksheet

  Speed, slip and poles, plus ladder logic: contacts, seal-ins, timers.

Worksheet or drill?

The drills mark you as you type and keep a streak — the fastest way to get quick at a single skill. A worksheet is slower on purpose: pencil, paper and the whole problem written out, the way the exam and the job want it. Use the drill until the answers come easily, then a sheet to prove you can do it cold.

About the numbers

Every figure on these sheets is a practice number. Where one could be mistaken for a real value — the conductor resistance in a voltage-drop problem, a motor’s speed on load — the sheet says “practice figure” right beside it. Nothing here is taken from a code book: the real values for a job come from your own book or the maker, and they change with the code cycle. The arithmetic does not.

Related

• Ohm's law worksheet
• Voltage drop worksheet
• Series / parallel worksheet
• Trade math worksheet
• Motor control worksheet
• Drills