War of Currents-1880AC DC
George Westinghouse (Westinghouse) and Nikola TeslaEuropeTransformer to step-up or down voltage
Thomas Edison (Edison ElectricAmerica
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At very high voltages, (current small) losses are lower in wiresAC won the war, mainly due to advantage of using transformers with AC, in 1903.
Fun Facts about ACThe electric current from outlets in your home is AC(120V).AC has frequency associated. In the United States, the alternating current (AC) has 60 cycles each second.In Europe , the frequency of electricity is at 50Hz. If you are travelling to Europe or Asia, you will need an adapter to use the electrical appliances from US.
The prongs are different too.
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Flow of electrons and direction of current
Electrons flow from negative terminal to positive terminalCurrent flows from positive terminal to negative terminal
Current direction is opposite to the flow of electrons!!!!
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Voltage Current
Resistance
Series V1+V2+V3
Same R=R1+R2+R3
Parallel
Same I1+I2+I3
1/R=(1/R1)+(1/R2)+(1/R3)
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Ammeter always connected in seriesVoltmeter always connected in parallel
Alternating Current (AC) – current flows in both directions alternatelyDirect Current- current is flowing in only one direction
STORY of AC and DC war
Referenceshttp://amasci.com/miscon/eleca.html#light
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