Electric current (I): The rate of flow of electric charge, measured in amperes (A).
Definition: , where is charge in coulombs and is time in seconds.
Conventional current: The flow of positive charge from positive to negative terminal outside the source of emf.
Charge carriers: Electrons (negative charge) and protons (positive charge). In conductors, electrons are the primary charge carriers.
Current in series and parallel circuits:
Sources of emf: Chemical cells, solar cells, generators, or dynamos convert energy into electrical energy.
Electrical energy users: Light bulbs, resistance heaters, motors convert electrical energy into light, heat, or mechanical work.
Energy transport: Electric circuits operate as systems where moving charges transport energy.
1. What is electric current?
2. What fundamental principle states that the total charge entering a junction in an electrical circuit equals the total charge leaving it?
3. What is the primary role of sources of emf in series and parallel circuits?
Electric current — definition?
Flow of charge per unit time.
Charge conservation — principle?
Total charge remains constant in a closed system.
Series vs parallel — current?
Same in series; divides in parallel.
Electric current — definition?
Rate of flow of electric charge
Charge carriers — primary in conductors?
Electrons
Series circuit — current?
Same current through all components
It covers the core concepts of Fundamentals of Electric Circuits, organized by topic with the key definitions, explanations and takeaways, so it's easier to learn and remember.
Read the full study guide →The practice quiz has 10 multiple-choice questions, each with an explanation. Use it to check what you know and find your gaps.
Take the quiz (10 questions) →There are 10 flashcards on Fundamentals of Electric Circuits, with a question on the front and the answer on the back. Try to recall each answer before you flip, and let spaced repetition bring back the ones you miss.
See all 10 flashcards →Upload a PDF or paste your notes. Revizly writes a study guide, a practice quiz and flashcards in about a minute.