True or false: carriers in a semiconductor

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Both electrons and holes act as charge carriers.

2. Statement is true

   Yes

   Statement

   A hole is left behind when an electron is freed.

3. Statement is true

   No

   Statement

   Only electrons carry charge in a semiconductor.

4. Statement is true

   Yes

   Statement

   Thermal excitation frees the carriers in an intrinsic semiconductor.

5. Statement is true

   Yes

   Statement

   An intrinsic semiconductor is a pure one.

Explanation