電験三種 理論 過去問 2026 一問一答

Complete explanations for all questions, calculation problem strategies, and AI-generated explanations included.

This app allows you to study past exam questions for the Third-Class Electrical Chief Engineer (Denken) Theory subject in a question-and-answer format. It includes the last 10 years of actual exam questions, covering the entire scope of DC circuits, AC circuits, three-phase AC, electromagnetism, electrostatics, electronic theory, and electrical measurement.

■ Main Features
・Includes over 300 questions from the past 10 years (all questions with explanations)
・Efficient learning in spare time with a question-and-answer format
・AI answers your questions instantly
・Automatically detects and prioritizes questions you struggle with
・Displays correct answer rate based on all users' answer data
・Allows selection of practice ranges by year (first half/second half)

■ Covers frequently tested topics in the Theory subject
You can focus on studying topics that appear every year, from Ohm's law, Kirchhoff's laws, Thevenin's theorem, RLC AC circuits, three-phase Y/Δ connections, Coulomb's law, Gauss's theorem, capacitors and electromagnetic induction, diodes, transistors, operational amplifiers, and the principles of various measuring instruments.
■ AI Question Function
You can ask the AI ​​questions about calculation procedures and the application of laws that you don't understand even after reading the explanations. You'll receive answers tailored to your level, such as "The concept of combined impedance" and "The meaning of phasor notation."

■ A system that makes it easy to continue learning
- Make learning a habit with "Today's Question" delivered daily
- Work together with peers in the league-based ranking system
- Check your learning progress with graphs

It's free to start. Aim to pass the Electrical Engineering Examination Level 3 Theory during your commute or free time.