Basic Electrical Concepts: This is Chapter 1 in the standard text and in most other texts. It defines terminology that you would normally be expected to be familiar with from a previous physics course. I urge you to take the time to refresh your conceptual understanding of these terms so that you are not working from a completely mechanical view of the behavior of circuits.
What is current? What is its definition as a derivative? What are the units of current?
How is current related to total charge?
Is current used up as the charges progress through a circuit?
What is actually moving through the circuit - positive charge or negative charge?
When a current is indicated in a particular direction which sign of charge is being described?
What is voltage? What is its definition as a derivative? What are the units of voltage?
What is the relationship between work/energy and voltage?
Is voltage a point value or a difference between two points?
What is electric power? What is its definition as a derivative? What are the units of power?
What is the relationship between power and energy?
What is another unit for energy derived from the units for power?
How do I determine power from voltage and current?
What is the engineering sign convention for power absorbed or produced by a device?
How do I understand the meaning of the sign of the power determined?