quinta-feira, 24 de abril de 2014

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Capacitor Discharge

An application of homogeneous differential equations

A first order homogeneous differential equation
has a solution of the form :
.
For the process of discharging a capacitor C, which is initially charged to the voltage of a battery Vb, the equation is
Using the boundary condition and identifying the terms corresponding to the general solution, the solutions for the charge on the capacitor and the current are:
.
Since the voltage on the capacitor during the discharge is strictly determined by the charge on the capacitor, it follows the same pattern.
.

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