EDEE275 - Lecture - Week 5-2012

EDEE275 - Lecture - Week 5-2012 - ElectricCircuits...

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Anila Asghar Teaching Elementary Science McGill University February 08, 2012 Electric Circuits Concept Maps
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http://www.youtube.com/watch?v=yZduvq1ewsU Electrochemical Cell/Battery
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Electrochemical Cell/Battery REDOX reactions in the electrochemical  cell (involve oxidation as well as  reduction) Oxidation  means  losing  electrons Reduction  means   gaining   electrons http://www.mhhe.com/physsci/chemistry/essentialchemistry/fl ash/galvan5.swf
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What did we learn about Electric Circuits?     Series Electrical Path:  In a series circuit  there is only a single path for  electrons to flow Resistance :  Two or more bulbs in a  series circuit pose a higher  resistance than a single bulb Controlling the flow of electricity:  One bulb cannot be turned off  without turning both off!
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What did we learn about Electric Circuits? Parallel Electrical Path:  In a parallel circuit  there are multiple paths/loops for  electrons to flow Current:  Current gets divided into the  parallel loops Controlling the flow of electricity:  The  two bulbs can be turned off and on  independently, i.e.,  one bulb can be  turned off without turning both off!   
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ELECTRIC CIRCUIT ANIMATION
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OHM’S LAW I = Current  A flow of charged particles is an electric  current ( electrons ) R = Resistance R is a constant called the electrical  resistance of the conductor.  Resistors   are conductors that  slow down  the  passage of charge
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OHM’S LAW V= Voltage  Voltage represents the potential difference 
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EDEE275 - Lecture - Week 5-2012 - ElectricCircuits...

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