Question

Identify the property which is not characteristic for a semiconductor?

(a) At a very low temperature, it behaves like an insulator

(b) At higher temperatures, two types of charge carriers will cause conductivity

(c) The charge carriers are electrons and holes in the valence band at higher temperatures

(d) The semiconductor is electrically neutral

This question was posed to me during an online exam.

I'd like to ask this question from Extrinsic Semiconductor topic in portion Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer 1

Correct answer is (c) The charge carriers are electrons and holes in the valence band at higher temperatures

Easiest explanation: In a semiconductor, electrons are the charge carriers in the conduction band and holes are the charge carriers in the valence band at higher temperatures. The other statements are not valid.