Question

With rise in temperature the resistance of germanium,

• A. increases
• B. decreases
• C. remains the same
• D. first increases then decreases

Answer 1

Answer: (B)

decreases

germanium is a semiconductor and as we know when a semiconductor is heated, electron-hole pair is generated in it which increases its conductivity as the number of charge carriers are increasing.
Now, as conductivity increases resistance decreases because both are opposite of each other.