Lessons Archive - Japan Electrician Guide

Lesson 2: Ohm’s Law and Power

Use V = IR and P = VI to solve the most common written exam calculation questions.

Combine vocabulary, diagrams, calculations, and safety into a final review strategy for the week before test day.

Learn how exam scenarios describe real faults: leakage, overheating, poor contact, and insulation problems.

Train with realistic mixed-topic questions and learn why each distractor is wrong, not only why one answer is correct.

Build a repeatable method for current, voltage, resistance, power, and unit-conversion questions under time pressure.

Learn the verbs, instruction words, and prompt phrases that tell you what kind of answer the exam wants.

A practical guide to the most important Japanese terms, how to read exam questions, and what to focus on first.

Use exam-style questions to recognize common mistakes in formula use, diagram reading, and vocabulary translation.

Study electric shock prevention, short circuit prevention, safe isolation, lockout thinking, PPE, and breaker behavior.

Identify VVF cable, ring sleeves, push-in connectors, outlet boxes, breakers, testers, and crimping tools.