Which of the following statements are true? A) The resistance of a conductor is proportional to the conductivity of the material of which the conductor is composed. B) The resistance of a conductor is proportional to the resistivity of the material of which the conductor is composed. C) A material that obeys Ohm's law reasonably well is called an ohmic conductor or a linear conductor. D) Good conductors of electricity have larger conductivity values than insulators. E) Semiconductors have resistivity values that are larger than those of insulators.
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