09 elec 08
- 2. Electrostatic Generators A device that produces static electricity at high voltage and low current. This static electricity is generated by friction or induction.
- 3. Wimshurst Machine Charge Collector 2 Plastic Discs Metal Ball (site of discharge) Layden jars (store electric charge) Rotator Wheel Base
- 4. Wimshurst Machine As one or both of the wheels spin, static electricity is generated. The charge collectors conduct this charge into the insulators where it is stored.
- 5. Wimshurst Machine One Leyden jar will become negatively charged and the other will become positively charged.
- 6. Wimshurst Machine Eventually the insulators will have stored enough charge to send a spark across the metal balls.
- 7. Van der Graaf Generator
- 8. Van der Graaf Generator 1) hollow metal sphere 2) upper electrode (passes on charges) 3) upper roller (conductor) 4) side of the rubber belt with positive charges 5) opposite side of the belt with negative charges
- 9. Van der Graaf Generator 6) lower roller (insulator) 7) lower electrode (ground) 8) spherical device with negative charges, used to discharge the main sphere 9) spark produced by the difference of potentials
- 10. Van der Graaf Generator A small motor causes the rollers to spin. The rubber belt becomes positively charged at the bottom and moves upward.
- 11. Van der Graaf Generator When the positively charged belt reaches the top it gains electrons and makes the metal sphere positive.
- 12. Van der Graaf Generator The belt goes back down to the bottom and loses its electrons to become positive again.