1. Electrical Current & Circuits

2. What Is A Current?
Current: the rate at which charge passes a given point
Made by electrons moving in a wire

3. AC/DC...what does that mean?
AC/DC: explains how current gets moved
DC: Direct Current (one-direction)
AC: Alternating Current (bi-directional)

4. Voltage
Voltage: difference in energy per unit charge as the charge moves between two points in the path of a circuit
Voltage can vary

5. Ώ Resistance Resistance: opposition to the flow of charge
Expressed in ohms Ώ
As resistance increases…current decreases!!!!

6. Ohm’s Law I = V R Amperes (A) = volts (V) ohms (Ώ) I = Current
V = Voltage
R = Resistance

7. Electric Power
The rate at which electrical energy is used to do work
Expressed in Watts (W)
P = V x I
Power = voltage x current

8. Circuits Complete, closed path through which electric charges flow
Open
Closed

9. Two Types of Circuits
1. Series: all parts are connected in one loop

10. Types Of Circuits
2. Parallel: different loads are located on separate branches