Question

• Statement I: By doping silicon semiconductor with pentavalent material, the electrons density increases.
• Statement II: The n-type semiconductor has net negative charge. In the light of the above statements, choose the most appropriate answer from the options given below:

Options

• Both Statement I and Statement Il are true.

• Statement I is true but Statement Il is false.

• Both Statement I and Statement Il are false.

• Statement I is false but Statement II true.

Answer 1

Statement I is true but Statement Il is false.

Explanation:

• Statement I is correct.
  Doping silicon with pentavalent impurity results in an extra electron, known as a donor impurity. As a result, electron density rises.
  
• Statement II is incorrect.
  The net charge on either type of semiconductor is zero.