Electronic Devi...

The conductivity of P - type semiconductor is due to

An N-type Ge is obtained on doping the Ge-crystal with

A P-type crystal is obtained by doping

1. silicon with arsenic,
2. silicon with aluminum,
3. Ge with boron,
4. Ge with phosphorus.

Majority current carriers in N – types are

A solid having uppermost energy – band partially filled with electrons is called

The number of valence electrons in a good conductor is generally

Electrons are forbidden in a band (in a crystal) called the

The behavior of Ge as a semi – conductor is due to the width of

P-N junction can be used as

To provide the abundance of holes the impurity added should be