The current across a capacitor is equal to the capacitance of the capacitor multiplied by the derivative or change in the voltage across the capacitor. The very basic capacitor equations link the capacitance with the charge held on the capacitor and the voltage across the plates. Derivation For Voltage Across A Charging And Discharging Capacitors Learn Sparkfun Com Shutting Down Safely With Capacitors Engineering Center From the relations between charge q capacitance c and voltage v we can express the capacity charge formula as these three equations. Voltage of a capacitor equation . If we assume that the potentiometer wiper is being moved such that the rate of voltage increase across the capacitor is steady for example voltage increasing at a constant rate of 2 volts per second the dvdt term of the formula will be a fixed value. As the voltage across the ca...
