ENGR 111 Notes

# ENGR 111 Notes - ENGR 111Lecture 3 Notes Homework for this...

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ENGR 111-Lecture 3 Notes 14:39 Homework for this class due Sep. 18 th 9/7/10 DC Fundamentals Electrical charge (q): more or fewer electrons In an atom, # of electrons = # of protons When they differ, electrical charge is present Electrical Charge Unit of charge: 1 coulomb (1C) Equal to charge of 6.24x10^8 elementary charges An Electrical (or electrostatic) field surrounds a charge The field strength proportional to charge The field strength inversely proportional to square of distance from the charge Charges of opposite polarity attract, vice versa Electrical charge can be created through chemical process Batteries Electric Fundamentals Voltage is the potential difference of charge at two points in an electrical field Voltage symbol V, unit Volts Voltage results in the flow of charge between two points Current Flow of charge = current Current symbol I, unit Amperes 1 Ampere current = Flow of 1 coulomb of charge past a point per second

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ENGR 111 Notes - ENGR 111Lecture 3 Notes Homework for this...

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