1. Producing Electric Current

2. 1. Electromagnetic Induction
An electric current is produced by moving a loop of wire through a magnetic field or by moving a magnet through a wire loop.

3. 2. Generator
Produces electric current by rotating a coil of wire through a permanent magnetic field.

4. 3. Electricity in your Home
Provided via a power plant which has huge generators.
Turbines - large wheel that rotates when pushed by water, wind, or steam.
Change the mechanical energy of the turbines to electrical energy.

5. 4. Direct vs. Alternating Current
Direct Current (DC) – current flows in only one direction; example: battery
Alternating Current (AC) – reverses direction of the current flow

6. 5. Transformers Contain two coils of wire (primary and secondary)
Controls the amount of voltage

7. 6. Types of Transformers
Step-Up - increases voltage, secondary coil has more turns of wire than the primary coil

8. 6.Types of Transformers
Step-Down- the primary coil has more turns of wire than the secondary coil; used to bring power into your home

9. 6. Types of Transformers

10. 7. How Electricity Travels

11. 8. Transmit AC
As electricity flows through power lines, a large percentage is lost due to conversion to thermal energy.
To reduce loss, send electricity at very high voltages.