Answer any TWO of the following.
a) What is Semiconductor? Explain its type.
Answers
Answer:
Semiconductors are materials that have properties of both normal conductors and insulators. Semiconductors fall into two broad categories: Intrinsic semiconductors are composed of only one kind of material; silicon and germanium are two examples. These are also called “undoped semiconductors” or “i-type semiconductors.
Explanation:
Semiconductor
QUICK FACTS
KEY PEOPLE
Duncan Haldane
Walter H. Brattain
Yves-André Rocard
RELATED TOPICS
Semiconductor device
Silicon
Germanium
Avalanche effect
Gunn effect
P-n junction
Trap
amounts of impurity atoms. For example, the addition of about 10 atoms of boron (known as a dopant) per million atoms of silicon can increase its electrical conductivity a thousandfold (partially accounting for the wide variability shown in the preceding figure).
conductivities
conductivities
Typical range of conductivities for insulators, semiconductors, and