Multiple choice

Conduction electrons in a semiconductor have higher mobility than holes because they

  1. Have negative charge

  2. Are lighter

  3. Experience collisions less frequently

  4. Need less energy to move them

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The mobility is inversely proportional to the effective mass and the effective mass of a hole is much higher than that of an electron. Thus, the mobility of an electron is higher than that of a hole.