Tesla's Electric Power Transmission
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Tesla's Electric Power Transmission
The challenge of sending electricity
In the late 1800s, cities were beginning to use electric lights and machines. Early electricity networks could serve nearby customers, but sending power over long distances was difficult. Some systems used direct current (DC), which flows in one direction. At the time, changing its voltage for transmission was challenging. Nikola Tesla developed ideas and equipment for alternating current (AC), in which the current repeatedly changes direction. AC transformers can raise voltage before electricity travels along transmission lines, then lower it near homes and businesses. For the same amount of power, transmitting at a higher voltage allows a lower current. This reduces energy lost as heat in the wires. Tesla worked with inventor and businessman George Westinghouse to develop AC power systems. Their work helped make long-distance electricity networks practical. The 1893 World's Columbian Exposition in Chicago used AC electricity, and an AC system later supplied power from Niagara Falls to Buffalo, New York. This was not the work of one person alone: engineers, workers and businesses all helped build the systems. Today, electricity grids use a range of technologies, but transformers and high-voltage transmission remain important.
Investigate the system
Use the reading to solve the questions.
- Direct current (DC)
- Alternating current (AC)
- Static electricity
- Neither AC nor DC
- Power station
- Step-up transformer
- Transmission lines
- Local transformer
- Raises voltage before long-distance transmission
- Lowers voltage for local use
- Generates electrical energy
- Carry electrical energy over long distances
2 printable pages
Page 1
Page 2
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