Simple Circuit
A simple electric circuit in which a closed path for current to flow is supplied by conductors (usually metal wires) connecting a load to the terminals of a battery, represented by the red parallel lines. The zigzag symbol represents the single resistor and includes any resistance in the connections to the voltage source.
Source
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"OpenStax College, College Physics. October 22, 2012."
http://cnx.org/content/m42344/latest/?collection=col11406/1.7
OpenStax CNX
CC BY 3.0.