Tuesday, January 25, 2011

WHY WON'T THIS THING TURN ON!?





  We all know what circuits are right?   Well for the people who don't, this is for you.  The people who do know, maybe you'll learn something today.  I'm going to start off talking about a complete circuit.  For there to be a complete circuit energy needs to be flowing through that object.  We've all watched TV right?  Well the cord at the end of the TV is where all the electricity is coming from.  The electrons from the outlet are flowing through the cord and into the TV.  Then they go back through the other side of the cord and back into the outlet and its start all over again. 



Have you ever made your own power source? Well you need a battery, two strings of wire, and a bulb.  The battery has a positive and negative side.  You put one end of the wire on the positive and one end of the other wire on the negative.  Then you put both ends of the two wires on the bulb and the bulb should light up!  
                               CLOSED CIRCUIT  OPEN CIRCUIT


You all have switches at home right?  Have you every wondered why the lights turn on and off?  When you flip the switch down the circuit is open so the energy can't flow through and the light can't turn on.  When you flip the switch up the circuit is closed so now energy can flow and the light turns on. 




Next is a short circuit,which is a current flow along a path where usually no electricity flows through.  Short circuits can have very high temperatures because of the high power waste in the circuit.  If you have a high voltage capacitor and its short circuited by a thin wire the wire could really explode.  Just know that some circuits are dangerous and that we all need to be more careful when we use and make things.