Question

Which type of semiconductor is obtained on mixing arsenic into silicon?

Options

• n-type

• p-type

• p-n type

• n-p type

Answer 1

n-type

Explanation:

Silicon (Si) is a Group 14 element. Arsenic (As) is a Group 15 element and has one extra valence electron compared to silicon. When arsenic is added (doped) into silicon, it contributes free electrons for conduction. This creates an n-type semiconductor, where electrons are the majority charge carriers.