War_of_the_Currents_Solution.pdf - Physics 212 Section Group War of the Currents 1 Name Signature Grade After this activity you should know ● why the

War_of_the_Currents_Solution.pdf - Physics 212 Section...

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Physics 212 War of the Currents 1 Section Group Name Signature Grade After this activity you should know : why the electric power system is AC x why electric power is transmitted at high voltages x the root mean square (RMS) value and the relation between the RMS and magnitude for a sinusoidal signal. The “War of the Currents” was a battle in the late 1880s over whether electric power distribution in the US would be direct current (DC) or alternating current (AC). Early power stations built by Edison Electric (later to become GE) produced DC power. Edison’s main adversaries were Pittsburgh financier George Westinghouse and scientist/engineer Nikolai Tesla 1 who advocated for the AC power more commonly used at that time in Europe. Edison waged a furious publicity and lobbying battle on the dangers of AC power. For example, Edison hired technicians to go around the country electrocuting stray cats and dogs (and larger animals) using AC power. He paid the inventor of the electric chair to use AC and suggested that executions should be called “Westinghousing”. AC eventually won out after Telsa used an AC hydroelectric plant at Niagara Falls to provide power to New York City. The fact that transformers can be used to increase or decrease the amplitude of AC voltages allowed the AC power to be transmitted at high voltages at lower losses through large distances. The voltages can then be reduced by using step down transformers to a safer value for use in homes. This worksheet will show why it is better to transmit power at high voltages.
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