Physics 201- Introduction to Electricity & Magnetism
October 4- Capacitors

 

 

 

 
 

 

  Batteries
 

A battery maintains a potential difference across its terminals.

The symbol for a battery:  
 
 
 

Let's connect two large plates to the terminals of a battery via a pair of wires.  What happens?  How much charge is on each plate?
 
 

What happens if we move the plates?  Does the charge per plate change?
 

We need a quantity that describes how the system will charge.   The quantity that describes the system's ability to hold charge is its capacitance.  We will see that a capacitor stores energy (you can convert this stored electrical energy to other forms).
 
 
 
 
 

 

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Jeff Phillips
phillips@lmu.edu
Loyola Marymount University
Fall 2002