14 RCCircuits

14 RCCircuits - Craig Ogilvie Review lecture 13 § Solving...

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Unformatted text preview: Craig Ogilvie Review lecture 13 § Solving DC circuits: choice of strategy – Combining resistors if in series/parallel => Requivalent – Kirchhoff’s loop and junction laws § Subtleties in applying Kirchhoff’s laws – Choose current directions and use those throughout problem » If you obtain a negative current => direction is opposite – Choose a direction for looping around circuit, “travel” Craig Ogilvie 11 I lower V higher V travel ∆ς ιν διρεχτ ιον οφ τ ραω ελ ∆ς 0 Craig Ogilvie Goals § Circuits with a capacitor, RC circuits – How long it takes for the capacitor to charge, discharge – Practice with Kirchhoff’s laws, numerics § Applications RC, pacemakers, turn signals, camera flashes Craig Ogilvie 22 Craig Ogilvie Charging a capacitor Craig Ogilvie 33 Pre-lecture video: use Kirchhoff’s loop law to analyze q(time) Craig Ogilvie Charging Capacitor Craig Ogilvie 44 ) 1 ( ) ( RC t final e Q t q-- = RC t e R t i- = ε ) ( Craig Ogilvie Question, ½ Charge, 1st round Craig Ogilvie 55 O bj1 0 2 How long does it take to put half the charge on a capacitor?...
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This note was uploaded on 09/20/2011 for the course PHYS 222 taught by Professor Johnson during the Spring '07 term at Iowa State.

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14 RCCircuits - Craig Ogilvie Review lecture 13 § Solving...

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