Simple Electric Circuit
(a) A simple electric circuit. A closed path for current to flow through is supplied by conducting wires connecting a load to the terminals of a battery. (b) In this schematic, the battery is represented by the two parallel red lines, conducting wires are shown as straight lines, and the zigzag represents the load. The schematic represents a wide variety of similar circuits.
Source
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"OpenStax College, College Physics. October 19, 2012."
http://cnx.org/content/m42341/latest/?collection=col11406/1.7
OpenStax CNX
CC BY 3.0.