1. Electricity
Electric Current

2. Electric Current
Electric current is the continuous flow of electric charges through a material.
Needed to power any electrical device.
Measured in amp (A)
Amps = amount of charge flowing past a given point each second.

3. Circuits
In order for electric current to exist, a circuit must first exist.
An electric circuit is a complete, unbroken path through which electric charges can flow.

4. Conductors and Insulators
A conductor is a material through which charges can flow easily.
Electrons are loosely bound
Conduction electrons form an electric current
Carry electric charges
An insulator is a material through which charges cannot flow easily.
Electrons are bound tightly to their atoms
Stop the flow of charges

5. Conductors

6. Insulators

7. Quia - Insulators & Conductors
The Blobz Guide - Game 2

8. Voltage Potential energy is capacity to do work.
Battery provides electrical potential energy
Voltage is the difference in electrical potential energy between two places.
This can also be called potential difference
Voltage causes a current in an electric circuit
Basically, it is the amount of force pushing an electric current

9. Voltage Source
A voltage source is a device that creates a potential difference in an electric circuit.
The voltage between the terminals is what causes the charges to move
Batteries
Generators

10. Resistance
Resistance is the measure of how difficult it is for charges to flow through a material.
Greater the resistance, less the current
Measured in ohm

11. What determines resistance?
Material
Insulators have high resistance
Conductors have low resistance
Length
Longer wire, more resistance
Shorter wire, less resistance
Diameter
Wide wire, less resistance
Thin wire, more resistance
Temperature
Higher temperature, resistance increases
Lower temperature, lower resistance

12. Brainpop! Current Electricity