PY208-Lecture-16

# PY208-Lecture-16 - Summary of Chapter 26 A source of emf...

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1 A source of emf transforms energy from some other form to electrical energy. A battery is a source of emf in parallel with an internal resistance. R Σ Sistors in series: Summary of Chapter 26 R Σ Sistors in parallel: Kirchhoff’s rules: 1. Sum of currents entering a junction equals sum of currents leaving it. 2. Total potential difference around closed loop is zero. RC circuit has a characteristic time constant: 26-5 Circuits Containing Resistor and Capacitor ( RC Circuits) Conceptual Example 26-13: Bulb in RC circuit. In the circuit shown, the capacitor is originally uncharged. Describe the behavior of the lightbulb from the instant switch S is closed until a long time later. Be More Successful in Physics (1) Work each of the assigned problems in the book – before attempting the WebAssign HW. (2) Carefully read and understand what the problem states – don’t just look for an equation to substitute numbers (3) Read the text material the night of the lecture. (4) Devote 3 hours for each class period.

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2 Physics 208N-004 Lecture #17 – 18 February 2011 Chapter 27: 1-3 – Magnetic Fields Sources of Magnetic Fields are: (1) Currents (2) Time Varying Electric Fields (dE/dt) Magnetic Dipole Field always closes on itself – no monopole.
3 Magnets and Magnetic Fields Electric Currents Produce Magnetic Fields Force on an Electric Current in a Magnetic Field; Definition of B Force on an Electric Charge Moving in a Magnetic Field

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## This note was uploaded on 09/18/2011 for the course PY 208M 87878 taught by Professor George during the Spring '09 term at N.C. State.

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PY208-Lecture-16 - Summary of Chapter 26 A source of emf...

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