Electric Power Technician Exam Questions and Key Concepts

Song Geon-woong emphasizes the importance of mastering frequently asked Electric Power Technician exam questions for effective preparation.

### Key Exam Questions for Electric Power Technician Certification: Insights and Strategies
* 🔌 Song Geon-woong from the Electric Power Department emphasizes the importance of **familiarizing oneself with frequently asked exam questions** for the Electric Power Technician certification, as they are based on **actual exam data from the past eight years**.
* 📊 The first question discussed pertains to relative permittivity and has appeared nine times since 2017, focusing on capacitors that use titanium oxide as a dielectric, specifically identifying **ceramic capacitors** as the correct answer due to their **non-polar nature** and **excellent cost-performance ratio**.
* ⚡ While electrolytic capacitors are polar and not applicable, mylar capacitors are noted for their use in filters, but the key points of **titanium oxide** and **non-polarity** lead to the conclusion that **ceramic capacitors** are the focus here.
* 🔍 The second question, asked six times since 2017, challenges the understanding of equivalent resistance in series versus parallel connections, where five 5-ohm resistors yield **25 ohms in series** and **1 ohm in parallel**, making the series resistance **25 times greater**.
* The calculation methods for parallel connections are highlighted, with the formula **R/n** simplifying the process for identical resistors, while different values require a **standard approach**.
* The third question, appearing eight times since 2018, tests knowledge of ferromagnetic materials, identifying **iron, nickel, and manganese** as examples, while platinum is categorized as **diamagnetic**, emphasizing the **importance of memorization techniques**.
* 📚 Overall, the session encourages participants to **reflect on the questions discussed** and to **internalize the material for future success**, with a promise of **more valuable content in the next session**.

반드시 나올 수밖에 없는 문제 - 전기기능사 필기

전기는빠지직(송건웅)

Key Exam Questions for Electric Power Technician Certification

The discussion focuses on exam questions for the Electric Power Technician certification, specifically those asked five or more times in the past eight years.

The first question, about relative permittivity, has been asked nine times since 2017 and relates to capacitors using titanium oxide as a dielectric.

The key points highlighted are the non-polar nature and cost-effectiveness of titanium oxide, leading to the conclusion that ceramic capacitors are the correct answer.

Understanding Equivalent Resistance in Resistor Configurations

The problem involves five equal-value resistors connected in series and parallel.

When connected in series, the total resistance is 25 ohms (5 ohms each).

In parallel, the equivalent resistance is 1 ohm, calculated using the formula R/n, where n is the number of resistors.

Comparing Resistance in Series and Parallel

The combined resistance formula applies when multiple resistors have the same value, but different values require a standard method.

In this case, the resistance in series is 25 ohms, while in parallel it is significantly lower, making the series resistance 25 times greater.

The problem can be confusing, especially for beginners, but with practice, it becomes easier to understand.

Understanding Ferromagnetic, Paramagnetic, and Diamagnetic Materials

Ferromagnetic materials, like iron, nickel, cobalt, and manganese, exhibit significant magnetization.

Paramagnetic materials, such as platinum, oxygen, nitrogen, aluminum, and tin, are magnetized to a lesser extent.

Diamagnetic materials include all substances not in the first two categories, making them the remaining elements.

Mastering Magnetic Bodies and Technician Certification

We have the knowledge to solve problems related to strong, box, and weak magnetic bodies, thanks to our understanding of nickel-copper alloys and the Baeksan system.

Today's session focused on past written exam questions for the regular technician certification, highlighting the importance of memorization and problem-solving in resistance values.

Three questions were prepared for the audience, with a promise of better content in the next video.