Question

Which of the following statements is not true?

(a) The resistance of intrinsic semiconductor decreases with the increase of temperature

(b) Doping pure Si with trivalent impurities gives p-type semiconductors

(c) The majority carriers in n-type semiconductors are holes

(d) A p-n junction can act as a semiconductor diode

I got this question in an interview.

This interesting question is from Intrinsic Semiconductor topic in portion Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer 1

The correct answer is (c) The majority carriers in n-type semiconductors are holes

To explain: The majority charge carriers in n-type semiconductors are electrons, not holes. It is made by adding an impurity to a pure semiconductor such as silicon or germanium. All the other statements are true.