02 - Basic Laws

# 02 - Basic Laws - EECS 215 Basic Laws Ohm's Law Voltage...

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EECS 215 Basic Laws J. Phillips EECS 215 Ohm’s Law Voltage across resistor is proportional to current iR v = Resistance: ability to resist flow of electric current i v R = i l v +- A l R ρ = = resistivity resistivity is a material parameter (this should become clear in 320) A i v

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J. Phillips EECS 215 Open circuit, short circuit Open circuit infinite resistance Short circuit zero resistance v + - i=0 v=0 + - i What happens if you connect a current source to an open circuit? What happens if you connect a voltage source to a short circuit? J. Phillips EECS 215 Circuit/Network Terminology Branch: single element, such as a resistor or source Node: connection point between two or more branches Loop: closed path in a circuit node branch loop
J. Phillips EECS 215 Circuit/Network Terminology Branch, nodes, and loops Parallel – connected to same two nodes Series – exclusively share a single node, same current series parallel branches = loops + nodes -1 J. Phillips EECS 215 Equivalent circuit example There are many ways to draw the same circuit!

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## This test prep was uploaded on 04/04/2008 for the course EECS 215 taught by Professor Phillips during the Winter '08 term at University of Michigan.

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02 - Basic Laws - EECS 215 Basic Laws Ohm's Law Voltage...

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