Electric Circuit

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Insulators and Conductors

• Electric Circuit
• Current provided by battery flows through wire,
  into the light bulb, through another wire, and
  back to the battery.
• Current flow of electrons

Electric lamp (glowing)
Electric lamp (not glowing)
Conductor lets electrons flow
Insulator doesnt let electrons flow
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Insulators and Conductors
Atom
Insulators hold electrons close like a dog on a
leash
Insulators let electrons flow like dogs running
free
Conductors let electrons flow like dogs running
free
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Resistance

• Resistance is like resistance to water flow in a
  hose. Larger diameter hose -less resistance,
  longer hose more resistance
• Voltage like pressure, current like flow

• Resistance How much the material resists the
  flow of electrons
• R V / I
• The higher the resistance, the slower the flow of
  electrons, the smaller the power output

R (? x L) / A R - Resistance
? - Density
L - Length
A - Area