VOLTAGE -is the potential difference between two points in a circuit By: Enrique Montano, Grant Davis, Anna Missana, Santiago Arriaga

Voltage and Energy  It is a measure of how much work is needed to move a charge between two points  Higher voltage is the more energy released per charge.

Voltage and Electric Current  As long as there is a voltage between two points on a wire, charges will flow in the wire.  The greater the voltage is, the greater the current.  The size of the current depends on the voltage.  A greater current means that more charges move in the wire each second.  A large current is needed to start a car. So, the bin a car has a fairly high voltage of 12 V (Volts – V).  In equations, the symbol for voltage is V.

Varying Nature of Voltage  Things that run on batteries usually need a low voltage (portable radio = 3 V)  An eel can give off a voltage of more than 600 V.  Most devices in the average household use changing currents from an outlet.  In U.S, electrical usually supply A.C at 120 V. So that’s why most electrical devices are produced to run on 120 V.

Questions  The less voltage there is the greater the current is; Answer: False  Voltage is a measure of how work is needed to move a charge between two points; Answer: True  How many points on a wire do charges need to flow through the wire? A. 3 B. 2 C. All of the above  What type of current make more charges move through the wire? A. Weak B. Strong C. All of the above  Short response: Can Voltage be lethal? How? Answer: If the voltage flows through the heart muscle, it is more likely to be lethal and if you are shocked anywhere with over 600 V. There have been people killed by only a 30 V shock but it depends on the skin resistance and condition if one will die or not.