Home › NEET UG › Physics › Semiconductor Electronics: Materials, Devices and Simple Circuits › Why does pure Si conduct slightly at room temper…
Why does pure Si conduct slightly at room temperature?
AIt has no forbidden energy gap
BIts bands overlap like a metal
CIts valence band is fully empty
DA small gap lets some electrons cross
Answer & Solution
Correct answer: D. A small gap lets some electrons cross
With a gap under 3 eV, room-temperature heat lifts a few valence electrons into the conduction band.
Related questions
Besides powering devices, rectifiers can detect what?What does the p in p-type stand for?Why is n-type material so called?Why are field-effect transistors called unipolar?In a Schottky junction, what replaces the n-type semiconductor?In a varactor diode, reverse bias varies which property?Solar cells and LEDs are essentially built from what?A semiconductor diode is made of which arrangement?