Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when...
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Transcript of Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when...
![Page 1: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649ea95503460f94bacac1/html5/thumbnails/1.jpg)
Current Electricity
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![Page 3: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649ea95503460f94bacac1/html5/thumbnails/3.jpg)
Why did the electron cross the road?
Or, why do electrons move in the wire when terminals are connected?
![Page 4: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649ea95503460f94bacac1/html5/thumbnails/4.jpg)
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Electric Circuits
•Conductor forms closed loop from/to battery•Charges lose PE
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Potential Difference (voltage)
•Change in PE as charge moves in circuit
•Variable - V•Unit – volt
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Current
•Rate charges move•Variable - I•Unit – Amp (A)
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Resistance
•Caused by internal friction
•Variable – R•Unit -
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Example
•60 W bulb•100 W bulb
•Which has more resistance?
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Which wire has greater resistance?
•Longer vs. shorter
•Thicker vs. thinner
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Vocabulary Review
•Potential difference •Current•Resistance
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Circuit Diagram
•Standard way to draw circuits
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Battery
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Resistor
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Bulb
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Switch
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In your notes…
•Draw a series circuit with a resistor, a light bulb, and a switch
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In your notes…
•Draw a parallel circuit with two branches (one bulb in each) and a switch
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Series Circuits
•One path for current flow
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Parallel Circuits
•Multiple paths for current flow
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Ohm’s Law
•V = I R
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1/14/15
•Review Ohm’s law problems
•Power quick notes and problems
•Magnet lab
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Ohm’s Law Problems
•Handout and equation triangle
•Calculator•Pencil
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Get now…
•Textbook•Composition book
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Electric Power
•Rate at which electrical work is done
•P = IV•Unit – watt
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Electric Power Problems
•Textbook page 189•16 - 18
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Magnet Lab