Question

At temperature $0K,$ the germanium behaves as a/an

• A. conductor
• B. insulator
• C. super-conductor
• D. ferromagnetic

Answer 1

Answer: (B)

insulator

0 K is a absolute zero, the electrons of the semi conductors are trapped and are immovable from their electron shell as they are in a low energy state. this makes the pure semiconductor an insulator. one must heat the semiconductor to give the enough energy to electrons to get free and to conduct electricity.So we can say At $0K,$ there is no free charge carries in the germanium and hence it behaves as an insulator.