lecture13

# lecture13 - Physics 2102 Gabriela Gonzlez b a Physics 2102...

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Physics 2102 Circuits Physics 2102 Gabriela González b a

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Recall: Resistors and Capacitors Resistors Capacitors Key formula : V= i R Q=CV In series : same current same charge Req=∑Rj 1/Ceq= ∑1/Cj In parallel : same voltage same voltage 1/Req= ∑1/Rj Ceq=∑Cj
Recall: DC circuits Loop rule : when walking along a loop, add potential differences across each element, and make the total equal to zero when you come back to the original point. Junction rule : at every junction, total current is conserved. Problem strategy: Replace resistors in series and in parallel with their equivalent resistors Draw currents in every wire, and label them Write the loop rule for each loop (or for the loop that involves your question) Write the junction rules for the currents. Solve the equations for the currents. Answer the question that was asked.

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a) Which circuit has the largest equivalent resistance? b)
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## This note was uploaded on 11/18/2011 for the course PHYSICS 2102 taught by Professor Dowling during the Fall '10 term at LSU.

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lecture13 - Physics 2102 Gabriela Gonzlez b a Physics 2102...

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