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final_review1

# final_review1 - Electrostatics 1 Charge force Like sign...

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1 Electrostatics 2 2 1 0 r q q k F = 1. Charge barb2right force: Like sign charges repel, unlike sign charges attract. Coulomb’s Law: direction and magnitude of force between two point charges. 2. Force barb2right electric field: Introduced to explain interaction over a distance. Field lines: start from positive charge, end at negative charge. More often used as: 3. Force barb2right charge: Force moves charge, does work on charge. Electric potential. 4. Electric field barb2right charge: Electric flux: Electric field originated from charge: Gauss’ Law. test q F E r r E q F r r = - = B A r d F U r r B) (A S d E E r r Φ = = surface enclosed E q S d E 0 ε Φ r r

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2 Direct Current dt dq I 1. Moving charge barb2right current: Electric field inside a conductor keeps the charges moving. Current direction is defined as the electric field direction. 2. Charge barb2right electric potential: Accumulated charge generates potential: capacitance. Parallel plate capacitor. Energy stored in a capacitor. 3. Current barb2right resistance: Ohm’s law defines resistance. Resistance as a function of the wire. Resistance as a linear function of temperature.
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final_review1 - Electrostatics 1 Charge force Like sign...

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