PC11 · Quiz — Semiconductors & Electronic Devices

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Question 1

A semiconductor has electrical conductivity:

AMuch higher than metals

BBetween that of conductors and insulators

CMuch lower than insulators

DExactly equal to that of metals

Question 2

N-type semiconductor is formed by doping with:

ATrivalent impurities like boron or aluminium

BPentavalent impurities like phosphorus or arsenic

CBivalent impurities like magnesium

DNo impurities — pure semiconductor

Question 3

In a forward-biased p-n junction diode:

AThe barrier potential increases

BCurrent flows freely as barrier potential is

CNo current flows under any condition

DThe depletion layer widens

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PC11 — Semiconductors & Electronic Devices — Quiz