semiconductor and diode

1. Valence electrons are

• in the closest orbit to the nucleus

• in the most distant orbit from the nucleus

• in various orbits around the nucleus

• not associated with a particular atom

A positive ion is formed when

• valence electron breaks away from the atom

• There are more holes than electrons in the outer orbit

• two atoms bond together

• an atom gains an extra valence electron

A pn junction is formed by

• the recombination of electrons and holes

• ionization

• the boundary of a p-type and an n-type material

• the collision of a proton and a neutron

What is the resistor value of an ideal diode in the region of conduction?

• 0 ohms

• 5 k ohms

• Undefined

• Infinity

What is the state of an ideal diode in the region of nonconduction?

• An open circuit

• A short circuit

• Unpredictable

• Undefined

In what state is a silicon diode if the voltage drop across it is about 0.7 V?

• No bias
  

• Forward bias

• Reverse bias

• Zener region

The process of adding an impurity to an intrinsic semiconductor is called

• doping

• recombination

• atomic modificaition

• ionization

A trivalent impurity is added to silicon to create

• germanium

• a p-type semiconductor

• an n-type semiconductor

• a depletion region

Determine the value of Vo