An electric field is applied to a semiconductor. Let the number of charge carries be $n$ and the average drift speed be $v$. If the temperature is increased, then

• A

  both $n$ and $v$ will increase
• Correct answer
  B

  $n$ will increase and $v$ will decrease
• C

  both $n$ and $v$ will decrease
• D

  $n$ will decrease and $v$ will increase

Hence, the correct answer is option: 'B'.