Lesson 1 - Voltage, Current, Resistance, Ohm's Law, Work

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11 Terms

1
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electric charge

property of fundamental particles that determines how they react to electric and magnetic fields

2
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electric charge unit

Cuolombs (C)

3
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voltage

  • the amount of work required to move an electric charge from some reference point to another point in space

  • work / charge

4
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current

  • rate at which electrical charges move through an area

  • charge / time

5
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resistance

  • opposition to flow of current

  • (resistivity x length) / area

6
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what determines how much resistance a wire has?

  • material of wire

  • length of wire

  • cross-sectional area

7
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what type of wire has most resistance?

long, thick, small cross-sectional area wires

8
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5 color bands

  • band 1: first digit

  • band 2: second digit

  • band 3: third digit

  • band 4: multiplier (number of zeros after third digit)

  • band 5: tolerance

9
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Ohm’s Law

V=IR

10
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Battery life

Battery Life = Capacity / Discharge rate

11
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What is power?

energy / time