Ch 7 Electricity Study Guide Name:______Per:____-

1. ______are the particles that have a positive charge and ______are the particles that cause a negative charge.

2. ______charges repel one another, and ______charges attract one another.

3. What is static electricity?

4. What are 3 ways that static charge is transferred? Give an example for each.

5. What is static discharge, or grounding? What can cause it?

6. Name 3 ways to increase resistance.

7. Define insulator and name 3 materials that make good insulators.

8. Define conductor and name 3 materials that make good conductors. 9. A freshman named Ohmer tests a neutral PVC pipe by holding it above neutral scraps of paper. What happens? Why?

10. Why does a person’s hair stand on end when they have their hand on a Van de Graaff generator?

11. The fibers on Ohmer’s wool sweater all stood on end. Why? What charge did they obtain?

12. Draw a negatively charged neutral pom- pom ball. Explain 13. piece of electrical tape and a what happens. 14.

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16. Draw a positively charged a positive pom-pom ball. piece of electrical tape and Explain what happens.

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19. Draw a circuit consisting of one battery and 20. What would happen if one bulb in the series three lights in a series. burned out?

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23. Draw a circuit consisting of one battery and 24. What would happen if one of the lights burned three lights in parallel. out?

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28. Circle the type of circuits that households are wired with? (parallel or series)

29. Which circuit would result in brighter lights, 3 bulbs in a series or 3 bulbs in parallel? Explain. 30.

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32. Define the following:

a. Voltage

b. Current

c. Resistance

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