Electricity Review Questions

1. What are the three ways to charge an object and how do they work?

2. Using the electrostatic series, which of the following will be positively charged and which will be negatively charged when rubbed together? a) wool acetate b) aluminum cotton c) ebonite paraffin wax d) human hair wool e) silk cotton f) glass silk

3. What is the difference between current and voltage.

4. Compare a water circuit and an electrical circuit on the following criteria. (material used, in what the material travels, the stored energy, used to control the flow)

5. How is lightning made?

6. What is a lightning rod and how does it work?

7. Why does your hair stand on end when you rub it with a balloon?

8. What is the difference between a conductor, an insulator, and a resistor?

9. Why do gasoline tanks have metal chains touching the ground while they are driving?

10.Where can a switch be placed in a circuit?

11.Ammeters are always connected in

12.Voltmeters are always connected in 13.Fill in the following diagrams with the # of electrons, # of protons, the leaves of the electroscope, and the placement of electrons and protons.

14.Draw schematic diagrams for the following circuits  the switch controls current returning to the power supply  the two bulbs are connected in series  voltage is measured across the source  voltage is measured across both bulbs  a switch controls the current between the 2nd and 1st bulb  all four bulbs are connected in series  voltage is measured across the first two bulbs  voltage is measured across the last two bulbs

 all three bulbs are connected in parallel  one switch controls only the 2nd bulb  the other switch controls all three bulbs  voltage is measured across the first bulb  voltage is measured across the battery

 a switch controls the current returning to the power supply  all five bulbs are connected in parallel  current is measured flowing through the 3rd and 5th bulb  current is measured as it leaves the power supply  voltage is measured across the 4th bulb  the first two bulbs have their own switches Z Y X W

S R Q M

Which lights will remain lit when the following switches are opened? a) Y b) X c) W d) U e) V f) T g) S h) R i) Q

Which lights will remain lit when the following switches are closed? j) Y k) X l) W m)U n) V o) T p) S q) R r) Q