Chapter 13 - Electric Circuits

Announcements Electrical Resistance Magnetic Fields Final QuestionsSeries combinationThe current through each resistor is the same (I 1 = I 2 = I) (why?)The total voltage difference ∆V tot across resistors connected in series is the sum of the voltage differencesacross the individual resistors (∆V tot = ∆V 1 + ∆V 2 + ...)The equivalent resistance is the algebraic sum of the individual resistancesR eq = R 1 + R 2 + R 3 + ...Therefore, the equivalent resistance of a series combination of resistors is always greater than anyindividual resistanceParallel combinationThe voltage difference across each resistor is the same (∆V 1 = ∆V 2 = V) (why?)The total current I is the sum of the currents across the individual resistors (I = I 1 + I 2 + ...)The inverse of the equivalent resistance is the algebraic sum of the inverses of the individual resistances1R eq= 1 R 1+ 1 R 2+ 1 R 3+ ...Therefore, the equivalent resistance of a parallel combination of resistors is always less than the smallestindividual resistance in the groupElectric Circuits