Exam 2: Semoconductors

The merging of a free electron and a hole is referred to as a

In a Light-emitting diode (LED),what lifts the electrons to higher energy levels?

The term used to describe the sharing of valence electrons that gives a crystal solidity is

Reverse bias is achieved when the negative source terminal is connected to the n-type material,and the positive terminal is connected to the p-type material.

Other than germanium,what is another type of semiconductor material generally used?

When free electrons fall from the conduction band to the valence band,excess energy

The depletion layer does not exist

Copper is a good conductor.

The valence electron is referred to as a free electron.

Silicon that has been doped with a trivalent impurity is called a (an)

Silicon that has been doped with a pentavalent impurity is called

When a free electron enters the p region of a junction diode,it becomes a

What is a disadvantage of a germanium device that prevents its prevalent use in modern computers,consumer electronics,and communication circuits?

Each time an electron diffuses across a pn junction,it creates a pair of ions.

The core of an atom consists of all the outer orbits.

A trivalent atom is also called

Current flows easily in a forward-biased diode.

Each pair of positive and negative ions at the pn junction is called a dipole.

What is another name for pn crystal?

When reverse bias is increased