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Monday, January 5, 2015

Introduction to Capacitors

Q1: What is a capacitor?
A1: A capacitor is a two-terminal element whose current through its terminals is proportional to the time rate of change of voltage across it. The proportionality constant is called capacitance (C).
$i=C\frac{dv}{dt}$

Q2: What determines capacitance?
A2: Capacitance is determined by the composition and geometry of the capacitor.

Q3: How do I simplify capacitors in series?
A3: Capacitors in series add like resistors in parallel.

Q4: How do I simplify capacitors in parallel?
A3: Capacitors in parallel add like resistors in series.

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