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- The simple RC circuit consists of
- a resistor, a capacitor, and a DC power
- supply. To solve the circuit when it is
- charging , Kirchoff's second law is applied:
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- Both i and q are time dependent, so
- another linearly independent equation is
- needed to solve the circuit. This equation
- shows the relation between i and q :
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- A way to understand this equation is to consider a
- plot of . The slope of the curve at the point
- equals the current at time t .
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