Lec3 - Electricity and Magnetism Electricity The flow of...

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Electricity and Magnetism Electricity The flow of electronics Two main types AC—Alternating Current DC—Direct Current Nikola Tesla Supported AC as an electrical standard Neon Light Thomas Edison Supports DC as an electrical standard AC beat DC when the Niagra falls plant successfully opens in 1896 AC Flows in 2 directions Used for distribution Cycles at 60Hz Easy to change voltages Single phase for residential Three phase for commercial Outlet Small/right—Hot Big/left—Neutral Ground Direct Current Flows in 1 direction Used in electronics Think Batteries Inductance Moving magnetic field past metal creates voltage Electric wire 1 pole Coil wire 2 poles
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Electrical Properties Power=Watts Current=Amps Electromotive Force=Volts Resistance=Ohms in DC Impedance=Ohms in AC Circuit Unbroken path to produce work LED Light emitting diode Transformer Changes Voltage Resistor Restrict flow of electronics Transistors Amplifies, detects, or switches Replaced vacuums tube Vacuum Tube Grid Acts as a gate; opens based on signal level
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Lec3 - Electricity and Magnetism Electricity The flow of...

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