Semiconductors & Electronic Devices is one of 9 topics in the Grade 12 Technical Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. Which two elements are the most widely used semiconductor materials in electronic devices?
Silicon and germanium
Copper and aluminium
Rubber and glass
Gold and silver
Answer: Silicon and germanium — Silicon and germanium are the most widely used semiconductor materials in electronic devices.
Easy
2. What is a pure semiconductor material with no significant impurities added called?
An intrinsic semiconductor
An extrinsic semiconductor
A conductor
An insulator
Answer: An intrinsic semiconductor — An intrinsic semiconductor is a pure semiconductor material with no significant impurities added.
Medium
3. Name the process of deliberately adding small, controlled amounts of impurity atoms to a semiconductor to increase its conductivity.
Answer: doping — Doping is the deliberate addition of controlled impurity atoms into a semiconductor to dramatically increase its conductivity.
