ObstrucofLe

ObstrucofLe is a comprehensive educational app designed for middle and high school students, helping them master the fundamental concepts of characteristic impedance in circuits and electromagnetic waves. This lightweight, English-language app offers a structured learning experience across three core modules: Explanation, Practice, and Tools & Utilities.
The Practice module contains 20 carefully designed questions across three difficulty levels—10 basic multiple-choice questions, 5 calculation questions, and 5 application scenarios—each with detailed explanations and instant feedback.
The Tools module provides quick formula reference, unit conversion functionality, and comprehensive FAQs. ObstrucofLe's clean, static interface, free of animation, ensures smooth operation on all mobile devices while focusing on the core learning content.