ENG 1450 Chapter Notes - Chapter 1-5: Electrical Network, Electrical Engineering, Computer Engineering
13 Dec 2018
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Fundamentals: the basic quantity of interest in electrical engineering is electric charge. Thus charge is never created or destroyed: the most basic concepts to be considered revolve around the forces produced by, and the subsequent movement of electrical charges, voltage: in mechanical systems work is defined as force x distance. In electrical terms, the work required, per unit charge, to move the charge from point a to point b, is referred to as the voltage between the two points. Voltage is the difference in potential energy between two points. The voltage at a given point b relative to point a is defined as: V = ir: voltage is a vector quantity and as a result has both magnitude and direction. Radio receiver antenna 10-7v = 100nv: current: current is the rate of movement of electric charge. In other words, it is the net positive charge transferred per unit time.
