Electrostatics and Circuits Formulas

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Electrostatics and Circuits Formulas
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Chapter 18

• Electric Forces and Fields
• N q/e
• F kq1q2/r2
• E F/qtest
• E kQ/r2
• E and F are vectors.

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Chapter 19

• Potential Energy and Potential
• W qDV
• V kQ/r
• PE kq1q2/r
• Parallel Plates
• V Ed
• PE ½ CV2
• Q CV

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Chapter 20

• Electric Circuits
• I Dq/Dt
• V IR (Ohms Law)
• R r L/A (Resistivity)
• R Ro 1 aDT (Can sub r in for R)
• P IV I2R V2/R

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Chapter 20 (cont.)

• Resistance
• Rs R1 R2 R3
• 1/Rp 1/R1 1/R2 1/R3
• Capacitance
• Cp C1 C2 C3
• 1/Cs 1/C1 1/C2 1/C3
• t RC