Blog 1: Notes on Current Electricity

1. Electrons in a static state have energy, but they are more effective when they transfer their energy.

2. Electric current is the flow of charge with a symbol I.

3. Current is the total amount of charge moving past a point in a conductor per time taken.
                     
                                                  Formula:        I   =  Q / T

4. An ammeter is a current-measuring device that must be wired so that all current flows through it.

5. In direct current, the current flows in a single direction from the power supply through the conductor to a load and back to the power supply. 

6. In alternating current, the electrons occasionally reverse the route of their flow.

7. A circuit is a path of current, which is needed for any electrical device to function properly.

A simple circuit with a load (light bulb), power source (battery).

8. Electric potential difference (V or Voltage) is the work done per unit charge as a charge is moved between two points in an electric field.

                            Formula:    V   =   E / Q   or   V   =  W / Q


9. A voltemeter is a device that can be used to measure potential difference.


10. An Ampere is a unit for current and the base unit is Coulombs(C) per second.