17.
What pure metal is the best conductor of electricity?
A.
Aluminum.
B.
Copper.
C.
Gold.
D.
Silver.
18.
What are the five items affecting the choice of a conductor?
A.
Ability to be fused, cost, elasticity, melting point, and weight.
B.
Ability to be fused, cost, current capacity, elasticity, physical size, and weight.
C.
Ability to be fused, current capacity, electronic characteristics, physical size, and wattage rating.
D.
Ability to be fused, current capacity, elasticity, physical size, and wattage rating.
19.
In a circuit, what is a Rheostat designed to do?
A.
Adjust capacitance.
B.
Adjust current.
C.
Adjust resistance.
D.
Adjust voltage.
20.
You have a conductor four inches long and one-half inch in diameter that has a resistance of 8 OHMS. If
this conductor was lengthened to 8 inches and the diameter was reduced to one-quarter of an inch, what
would happen to the resistance.
A.
Decrease.
B.
Increase.
C.
Remain at 8 OHMS.
E-5
IT0340
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