PHYSICS 112 - REVIEW FOR EXAM 2CURRENT ÐMÑ Àrate at which electic charge is flowing in a wire ÐM œUÎXÑ?RESISTANCE and POTENTIAL DIFFERENCE ÐVÑÐZ Ñ?related by Ohm's law: . The?ZœMVpower dissipated in a resistor has magnitude .TœM ZœMVœÐ ZÑÎV??22BATTERYwith potential difference across its terminals: . Power delivered byZZœMVbatbattotaleqbattery is (negative if current flows from terminal to terminal through battery).TœMZtotalbat?SERIES CIRCUIT:battery and resistors form a circuit in which all moving charges pass through eachcomponent in the circuit. sum of all the resistances in the series circuit. .VœM œÐZÑÎVeqtotalbateq?VMZœV‚MTœM‚Z=?7 œ V=+7/ œ M=?7 œZœ V‚ M=?7 œ M‚Z"total2totaleqtotalbateqtotaltotalbatPARALLEL CIRCUITS: Every parallel circuit has the same potential difference.ZœV‚MTœM‚ZZZVœ "ÎÒ ÎV ÎV Ó=?7 œ M= 7 œZœ V‚ M=?7 œ M‚Z?
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This note was uploaded on 02/11/2012 for the course PHYSICS 112 taught by Professor Fretwell during the Summer '08 term at Iowa State.