Lecture1

Apuntes

Lecture1 Week 2 What is a Circuit? A circuit is a complete loop that lets electric charge move from the source, through components, and back to the source. Open switch = broken path No continuous current Closed switch = complete path Current can flow Think: battery → wire → switch → bulb → wire → battery + – Switch Battery Light Bulb Wire path must be complete Circuit Components Circuit Components Source: F. Ulaby, M. Maharbiz, Circuits, 2 nd Ed, National Technology and Science Press, 2013. or LEARN TO RECOGNIZE CIRCUIT SYMBOLS Circuit symbols Engineers do not draw realistic pictures every time. They use symbols so that everyone reads the circuit the same way. Battery/source: provides voltage Wire: connects parts of the path Resistor: limits current Switch: opens or closes the path Meters: measure voltage or current + – Switch Battery Bulb Wire path must be complete What is current? What is current? Source: F. Ulaby, M. Maharbiz, Circuits, 2 nd Ed, National Technology and Science Press, 2013. DC vs AC Charge Notation (Direction) Charge Movement CURRENT: THE MOVEMENT OF CHARGE (ELECTRONS) THROUGH A CONDUCTOR IF THERE IS CURRENT,...