1. Current Electricity

2. An electrical current is a flow of charged particles (electrons or ions) through a circuit

3. In a circuit with a battery or chemical cell, electrons flow from a negative terminal to a positive terminal through the circuit

4. Conductors are materials through which a current can flow
Metals are good conductors
Other materials like carbon or water are also good conductors

5. Schematic diagrams are diagrams of electric circuits
Symbols are used to represent different parts of an electrical circuit

6. Schematic Diagram

7. Series and Parallel Circuits
Series circuits have a single pathway for the current
Parallel circuits have more than one pathway for the current

8. Meters are used to measure current, voltage or resistance in a circuit

9. Current
a measure of the number of charged particles passing a point in a given time
measured in amperes (A) or amps
1A = 1 coulomb of charge per second
Symbol for current is I

10. An ammeter is used to measure current in a circuit
Ammeters are connected in series

11. Conventional Current
In an electric circuit, electrons actually flow from the negative terminal to the positive terminal
In conventional current, we assume they are flowing from positive to negative

12. Voltage
a measure of the amount of electrical energy carried by each charged particle in a circuit
measured in Volts (V)

13. A voltmeter is used to measure voltage
A voltmeter is connected in parallel

14. Resistance A resistor resists the flow of current in a circuit
Resistors convert electrical energy into other forms such as heat or light
Resistance (R) is measured in Ohms (Ω)
Resistance