Question

Among the following the incorrect statement is

• A. Density of crystals remains unaffected due to Frenkel defect.
• B. In BCC unit cell the void space is 32%.
• C. Density of crystals decreases due to Schottky defect.
• D. Electrical conductivity of semiconductors and metals increases with increase in temperature.

Answer 1

Answer: (D)

The electrical resistance of metals depends upon temperature. Electrical resistance decreases with decrease in temperature and becomes zero near the absolute temperature. Material in this state is said to possess super conductivity.