Exam 2: Semoconductors

What is the term for reverse current on the surface of a crystal?

A silicon diode will allow a continuous current in the forward direction,if the source voltage is

What type of atoms are added to molten silicon in order to increase the number of free electrons?

Doping is a process of adding impurity atoms to an intrinsic crystal to alter its electrical conductivity.

The temperature of the surrounding air is called

Intrinsic semiconductor has unequal number of free electrons and holes.

At room temperature,a silicon crystal acts like an insulator.

The valence orbit controls the electrical properties of the atom.

A doped semiconductor is called an intrinsic semiconductor.

When the departure of an electron creates a vacancy in the valence orbit,it is called a

The border between p-type and n-type crystal is called the

What type of impurity is added to pure silicon to get an excess of holes?

In an n-type semiconductor,the free electrons are called the

What is the term for the temperature inside a diode,right at the pn junction?

In a semiconductor,thermal energy produces free electrons that go to the next higher-energy band called the

As dipoles build up,the region near the pn junction is void of all charges and is called the restoration layer.

What results when the negative battery terminal is connected to the p side of a pn junction,and the positive battery terminal to the n side?

How many valence electrons are there in a germanium semiconductor?

How many electrons are in the valence orbit of a silicon crystal?

What is the approximate current level in a reverse-biased diode?