15. Which of the following is TRUE?  a.   A conductor has a large amount of energy gap between conduction band and valance band  b.   A semi-conductor material does not allow the flow of electrons at all time.  c.   A good insulator material has 8 valance electrons  d.   A good conductor material has 3 valance electrons.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
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Chapter12: Electronic Control Devices
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15. Which of the following is TRUE? 
a.   A conductor has a large amount of energy gap between conduction band and valance band 
b.   A semi-conductor material does not allow the flow of electrons at all time. 
c.   A good insulator material has 8 valance electrons 
d.   A good conductor material has 3 valance electrons.

 

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