What is an electric Current Flow ?

Chapter Current Flow

Complete Electronics Self Teaching Guide with Projects
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Complete Electronics Self Teaching Guide with Projects

  • CHAPTER 1 DC REVIEW AND PRETEST2 ■ Power ■ Small currents ■ Resistance graphs ■ Kirchhoff’s Voltage Law ■ Kirchhoff’s Current Law ■ Voltage and current dividers ■ Switches ■ Capacitor charging and discharging ■ Capacitors in series and parallelCURRENT FLOW1  Electrical and electronic devices work because of an electric current. QUESTIONWhat is an electric current? ANSWERAn electric current is a flow of electric charge. The electric charge usually consists of negatively charged electrons. However, in semiconductors, there are also positive charge carriers called holes.2  There are several methods that can be used to generate an electric current. QUESTIONWrite at least three ways an electron flow (or current) can be generated. Book Authorc01V107/04/2012 2:42 PM c01.indd 27/4/2012 2:44:22 PM