Lecture%2014%202220%20Spring%202009

# Lecture%2014%202220%20Spring%202009 - Announcements and...

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1 Announcements and Reminders Exam 1 is today starting at 4:15 p.m. Be sure to arrive a few minutes early to find your room and seat. Homework 9 is due Friday. Turn in a piece of paper with name and responses if you don’t have your clicker with you today, or if you haven’t given me your clicker ID yet Kirchhoff’s Rules • There are ways in which resistors can be connected so that the circuits formed cannot be reduced to a single equivalent resistor • Two rules, called Kirchhoff’s rules , can be used instead Statement of Kirchhoff’s Rules • Junction Rule – The sum of the currents entering any junction must equal the sum of the currents leaving that junction • A statement of Conservation of Charge • Loop Rule – The sum of the potential differences across all the elements around any closed circuit loop must be zero • A statement of Conservation of Energy Mathematical Statement of Kirchhoff’s Rules • Junction Rule: Σ I in = Σ I

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## This document was uploaded on 09/30/2009.

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Lecture%2014%202220%20Spring%202009 - Announcements and...

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