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Classify the conducting materials.
Conducting materials are classified by low resistivity materials and high resistivity materials.
Low resistivity materials: The conducting materials having resistivity in between 10-8 to 10-6 ohm-m come in this category and are utilized in transmission and distribution lines, transformers and motor windings.
High resistivity materials: The conducting materials having resistivity in between 10-6 to 10-3 ohm-m come in this category and are utilized for making resistance elements for precision instruments, heating devices and rheostats.
A250-V, 50-kWshort-shunt compound dc generator,whose schematic diagramis shown in Figure, has the following data: armature resistance 0.05 , series-field resistance 0.05 , and sh
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