the letter that corresponds to the correct a 1. The resistance of a resistor: (a) Does not depend on its size and properties of the material. (b) is directly proportional to the electrical conductivity. (c) Is inversely proportional to the electrical conductivity. (d) is inversely proportional to the resistivity. 2. The resistivity of pure copper is much less than commercially pure copper because (a) Impurities in commercial pure copper increase the resistivity. (b) Resistivity is not a microstructure sensitive property. (c) Commercially pure copper is more pure. (d) All of the above. 3. A material is dielectric when: (a) It is able to stop the flow of AC and DC current. (b) It is able to store electrical charge. (c) It stops DC current flow only. (d) All of the above. 4. Spheroidizing (a) Eliminates the undesirable effects of cold working. (b) Improves machinability. (c) Is done to improve strength. (d) All of the above. 5. The following construction material is a naturally occurring composite: (a) Concrete. (b) Wood. (c) Asphalt. (d) Structural steel. 6. Wood is a bad choice of material in applications that involve: (a) Bending. (b) Tension.