Which of the following has the highest resistivity?
Correct answer: A. Germanium
- A. Germanium
- B. Silver
- C. Copper
- D. Platinum
Explanation
Resistivity (ρ), is resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length 1ρ = RA/l . The units of which are ohm.meter.The resistivity depends on the material of the conductor and the values of each element in a descending order is as follows,4.6×10-1, germanium10.6×10-8, platinum1.6×10-8, copper1.59×10-8, silverGermanium has the highest resistivity, while Silver has the least resistivity.
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About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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