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Current Electricity

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Page 1: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Current Electricity

Page 2: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?
Page 3: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

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?
Page 5: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?
Page 6: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?
Page 7: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Electric Circuits

•Conductor forms closed loop from/to battery•Charges lose PE

Page 8: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Potential Difference (voltage)

•Change in PE as charge moves in circuit

•Variable - V•Unit – volt

Page 9: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Current

•Rate charges move•Variable - I•Unit – Amp (A)

Page 10: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Resistance

•Caused by internal friction

•Variable – R•Unit -

Page 11: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Example

•60 W bulb•100 W bulb

•Which has more resistance?

Page 12: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Which wire has greater resistance?

•Longer vs. shorter

•Thicker vs. thinner

Page 13: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Vocabulary Review

•Potential difference •Current•Resistance

Page 14: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?
Page 15: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Circuit Diagram

•Standard way to draw circuits

Page 16: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Battery

Page 17: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Resistor

Page 18: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Bulb

Page 19: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Switch

Page 20: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

In your notes…

•Draw a series circuit with a resistor, a light bulb, and a switch

Page 21: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

In your notes…

•Draw a parallel circuit with two branches (one bulb in each) and a switch

Page 22: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Series Circuits

•One path for current flow

Page 23: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Parallel Circuits

•Multiple paths for current flow

Page 24: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Ohm’s Law

•V = I R

Page 25: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

1/14/15

•Review Ohm’s law problems

•Power quick notes and problems

•Magnet lab

Page 26: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Ohm’s Law Problems

•Handout and equation triangle

•Calculator•Pencil

Page 27: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Get now…

•Textbook•Composition book

Page 28: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Electric Power

•Rate at which electrical work is done

•P = IV•Unit – watt

Page 29: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Electric Power Problems

•Textbook page 189•16 - 18

Page 30: Current Electricity. Why did the electron cross the road? Or, why do electrons move in the wire when terminals are connected?

Magnet Lab


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