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1.  What are the positive and negative charged particles in an atom?

2.  What force keeps the electrons of an atom revolving in regular orbits?

3.  How is electricity conveyed?

4.  Answer BOTH of these questions in the space below:

A)  What substances are the best conductors of electricity?

B)  Why?

5.  What is an insulator?

6.  What is the fundamental law concerning electrical charges?

7.  What unit is used to measure electromotive force?

8.  What are the six common methods of producing voltage?

9.  What is a thermocouple?

10.  Where is the photoelectric cell used?