Wednesday, 19 December 2012

4~ Capacitor in Series & Parallel

Capacitors in parallel
* have the same applied voltage
* their capacitance add up
* charge is apportioned among them by size
* using the schematic diagram to visualize parallel plates, it is apparent that each capacitor contributes to the total surface area.

C_\mathrm{eq}= C_1 + C_2 + \cdots + C_n

capacitors in parallel

Capacitors in series
* the capacitors each store instantaneous charge build-up equal to that of every other capacitor in the series
* the total voltage difference from end to end is apportioned to each capacitor according to the inverse of its capacitance
* the entire series acts as a capacitor smaller than any of its components.

\frac{1}{C_\mathrm{eq}} = \frac{1}{C_1} + \frac{1}{C_2} + \cdots + \frac{1}{C_n}


capacitors in series

NOTE : Capacitors are combined in series to achieve a higher working voltage, for example for smoothing a high voltage power supply. 

No comments:

Post a Comment