Question: A material is formed into a long rod with a square cross-section 0.50 cm on each side. When a 100-V voltage is applied across a

A material is formed into a long rod with a square cross-section 0.50 cm on each side. When a 100-V voltage is applied across a 20-m length of the rod, a 5.0-A current is carried.
(a) What is the resistivity of the material?
(b) Is the material a conductor, an insulator, or a semiconductor?

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