Introduction to Electrical and Computer Engineering#
What is current?
The flow of charged particles (electrons) through a conductive medium.
What is voltage?
Electrical potential difference between two points (“pressure” in a circuit), measured in volts.
How is voltage measured?
Between two points.
What is ground?
A reference zero-voltage point.
Does voltage exist without anything flowing?
Yes.
How is current measured?
Through a single point.
What is the mathematical formula for current?
Charge divided by time: coulombs per second (C/s), which equals one ampere (A).
Which direction does current flow in this class?
From positive to negative.
What is Ohm’s Law?
\( V = IR \)
What is resistance?
A load that resists electron flow in a circuit, measured in ohms.
What is the definition of power in electrical engineering?
Work over time; in circuits, P = IV.
