Direct Current

This week in Physics we learned about Electric Current, Resistance, and Power.  We learned a couple of basic definitions of this unit: voltage, current, and resistance.  A voltage is the amount of work that each charge will do as it goes through the circuit; it can also be thought of as the amount of push on the charges.  A current is the number of charges passing a point per second; also know as the rate of flow of charge (I).  Resistance is the opposition to flow of charge; also any application that asks the charge to do and will slow it down. One thing I really understood this week was about circuits.  We learned that for a system to work, there needs it needs to be in a circuit.  Also, without potential difference (voltages), charges will not flow.  The different types of circuits are direct (DC) and alternating (AC).  A direct circuit makes charges flow one way.  An example I related this to was my laptop charger.  As I was writing this blogpost, my computer was about to die, so I grabbed my laptop charge and connected it to the outlet in the wall.  Because of the direct current, my laptop is able to charge back to 100% battery. Thank God for laptop chargers!`