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summary6

# summary6 - Summary Lecture Summary Lecture 6 Dielectric...

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Summary Lecture 6 Summary Lecture 6 Dielectric Inserting an insulator - a dielectric - into the gap of a capacitor increases the capacitance C kC or A/d k A/d Energy stored in a capacitor PE = QV = CV 2 =Q 2 /C 1 1 1 PE = QV = = Q /C 22 2 Battery Zn Cu Electrodes Electrolyte e - Zn 2+

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Electric Current The electric current in a wire is the net amount of charge that flows through it per unit time I = Q t Current is measured in Ampere (A Current is measured in Ampere (A) Ohm’s V = R I Ohm s Law Resistance is measured in Ohm ( )
Resistance measured in Ohm measured in Ohm ( ) use Ohm’s law: R = V/I or R= L Length R = A Area Resistivity

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