ECE140 Study Guide - Current Source, Circuit Diagram, Inductor

• School: University of Waterloo
• Department: Electrical and Computer Engineering
• Course: ECE140
• Professor: Michael Ibrahim

Document Summary

Under this system, electric current is measured in. Amperes (a), work and energy is measured in joules (j), and power, or the rate in which work is done, is measured in watts (w). In increasing order, from 10 18 and ascending in factors of three, the pre xes we use are atto, femto, pico, nano, micro, milli, kilo, mega, giga, and tera. The basic unit of positive charge is the proton. The unit of negative charge is the electron. Electric current is de ned as charge in motion, and follows the direction of the ow of positive charge (opposite the direction of electron ow). The fundamental unit of charge is the coulomb (c). A proton or electron has a charge of 1. 602 10 19. In moving charges from one place to another, we may also transfer energy. By changing the current (with respect to time), we can transfer information.