Capacitors are very useful little electronic components.  They store charge for a short time.  In effect they are electrical springs.  As such they are widely used in electronic circuits as timers.  Other uses include smoothing circuits that "iron out" electrical bumps.  They also act as filters.

We will look at how capacitors store charge and energy.  The energy is stored as an electric field between two plates that are very close together.

1. Gravity Fields
Tutorial 1 Capacitance of a capacitor Full Page Go
Tutorial 2 Exponential Decay Full Page Go
Tutorial 3 Physics of Capacitors (Extension) Full Page Go

AS Data Sheet (.pdf file).  Click on the PDF icon.  Download it, print it off, and use it whenever you do a test. 

It will also make very good lavatory reading.  Knowing where a formula can be found will help you no end in the exam.

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