Lesson 4: Electrical Principles
Electrical principles move to resonance, Q, time constants and phasors, which the circuit lessons need.
What you will learn
- E5A Resonance and Q: characteristics of resonant circuits; series and parallel resonance; definitions and effects of Q; half-power bandwidth
- E5B Time constants and phase relationships: RL and RC time constants; phase angle in reactive circuits and components; admittance and susceptance
- E5C Coordinate systems and phasors in electronics: rectangular coordinates; polar coordinates; phasors; logarithmic axes
- E5D RF effects in components and circuits: skin effect; real and reactive power; electrical length of conductors
1. Read
- Electronics basics: Capacitors, inductors and reactanceHelps with E5A
- All 49 E5 questions with their answers and explanationsEvery group, with the rule or source behind each answer
2. Explore
- Reactance and resonance
Enter 50 microhenries and 40 picofarads. The circuit resonates near 3.56 MHz.
This is exam question E5A02.
3. Practice
Practice one group at a time. A group is ready when you have answered every one of its questions and learned at least 80 percent of them; a question counts as learned when your last three answers to it were correct. To review quickly, go through this lesson’s questions as flashcards.
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