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Published byMorgan Maxwell Modified over 4 years ago

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Electric Energy The energy of electrical charges In order for charges to move, an electric field (area where another object experiences a force) must be set up and start the electrons moving

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Voltage: How much work is needed to move a charge between 2 points The higher the voltage, the more electricity is released per charge The potential difference between two points that cause charges to move Measured in volts (V)

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Current: - The flow of charges, - The rate at which charges pass through a point - Measured in amperes (A)

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Voltage & Electrical Current As long as there is a voltage between 2 points on a wire, charges will flow through the wire The greater the voltage, the greater the current

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2 Types of current in electrical energy Direct Alternating

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Direct current Charges flow in the same direction Example: batteries

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Indirect current Charges shift flow from one direction to another Advantage is that the voltage can change between the electrical producer & the user 22,000 V to 120 V

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Resistance A factor that that determines the amount of current in a wire The opposition to the flow of electric charge; “electrical friction” Depends on Material -Good conductors have low resistance Thickness – thicker, less resistance Length – shorter, less resistance Temperature- hotter, more resistance due to vibration

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Ways that electricity can be generated Ways that electricity can be generated Generators – ME to electrical Cells –chemical & radiant to electrical Thermocouples –thermal to electrical Photocells – light energy to electrical

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Cells Cells change chemical or radiant energy into electrical energy Wet and dry cell batteries

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http://www.ndt- ed.org/EducationResources/HighSchool/ Electricity/alternatingcurrent.htm http://www.ndt- ed.org/EducationResources/HighSchool/ Electricity/alternatingcurrent.htm http://www.ndt- ed.org/EducationResources/HighSchool/ Electricity/alternatingcurrent.htm http://videos.howstuffworks.com/hsw/133 73-understanding-electricity-how- electricity-works-video.htm

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