# EL ENG 16A Lecture Notes - Lecture 1: Linear Combination, Current Divider, Voltage Divider

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## Document Summary

1 volt = the voltage difference between two points that will require 1 joule of energy to move 1 coulomb unit of charge betwe en the points (1 v = 1 j/c) Voltage is a relative quantity defined between two points (an absolute voltage does not make sense) Voltages can only be measured across elements (voltage difference) To measure voltage, a reference point must be defined. A short circuit parallel to any circuit element (resistor, capacior, etc. ) is equivalent to just a short circuit. The circuit element can be ignored because no current goes through it (all current goes through the short circuit) voltage source - a component which supplies a voltage across its terminals. The + and - indicate the direction in which the voltage is pointing (+ indicates the side of higher voltage, and - indicates side of lower voltage)

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