Chapter_25

# Chapter_25 - Chapter 25 Current resistance and...

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Chapter 25 Current, resistance, and electromotive force Responsible for sections 1-5

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How do we charge capacitor? Connect battery: electrons flow Equilibrium: capacitor is charged and electrons no longer flow E = 0 Electromotive force: a battery + E = 0 + + + + Electromotive force: a battery + e e E F EF C
Current in resistor Electric field in a perfect conductor is zero implies that the electric potential does not change from one location in the wire to another. Electromotive force: a battery + E = 0 E = 0 e F E R Electric field in a resistor that is attached to an electromotive force is never zero. Never attain equilibrium! Do attain “steady state”.

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Steady state • Constant rate of charge flow (C/sec) through circuit. • The rate of charge flow past any point in a circuit is the same (If the circuit doesn’t branch) • Magnitude of the charge flow is called current I in C/sec ampere.
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Chapter_25 - Chapter 25 Current resistance and...

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