[amp_mcq option1=”acceptor ions” option2=”donor ions” option3=”free electrons” option4=”holes” correct=”option4″]<\/p>\n
The correct answer is: D. holes<\/strong><\/p>\n A hole is a vacancy in the valence band of a semiconductor. It can be thought of as a positively charged particle that can move through the material. Holes are the majority carriers in p-type semiconductors.<\/p>\n In a pnp transistor, the current is carried by holes in the p-type base region. The holes are injected into the base region by the emitter, and they then diffuse into the collector region. The collector region is heavily doped with n-type material, so there are many free electrons available to combine with the holes. This combination of holes and electrons produces a current that flows through the collector circuit.<\/p>\n Acceptor ions are negatively charged ions that are formed when a semiconductor is doped with p-type material. Donor ions are positively charged ions that are formed when a semiconductor is doped with n-type material. Free electrons are electrons that are not bound to atoms in a semiconductor.<\/p>\n I hope this explanation is helpful!<\/p>\n","protected":false},"excerpt":{"rendered":" [amp_mcq option1=”acceptor ions” option2=”donor ions” option3=”free electrons” option4=”holes” correct=”option4″]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[970],"tags":[],"class_list":["post-54854","post","type-post","status-publish","format-standard","hentry","category-transistors","no-featured-image-padding"],"yoast_head":"\n