Semiconductors (IndiaBix)

You have an unknown type of diode in a circuit. You measure the voltage across it and find it to be 0.3V. The diode might be

A GERMANIUM DIODE

The boundary between p-type material and n-type material is called

A PN JUNCTION

What factor(s) do(es) the barrier potential of a pn junction depend on? A. Type of semiconductor material B. The amount of doping C. The temperature D. All of the above

ALL OF THE ABOVE

The wide end arrow on a schematic indicates the ___________ of the diode

ANODE

A silicon diode measures a low value of resistance with the meter leads in both positions. The trouble, if any, is

THE DIODE IS INTERNALLY SHORTED

The term "bias" in electronics usually means

THE VALUE OF DC VOLTAGES FOR THE DEVICE TO OPERATE PROPERLY

The forward voltage across a conducting silicon diode is about

0.7V

A silicon diode is forwarded-biased. You measure the voltage to ground from the anode at _________, and the voltage from the cathode to ground at __________.

2.3V, 1.6V

The maximum number of electrons in each shell of an atom is

2n^2 WHERE n IS THE NUMBER OF THE SHELL

A reverse-biased diode has the ___________ connected to the positive side of the source, and the __________ connected to the negative side of the source

CATHODE, ANODE

The movement of free electrons in a conductor is called

CURRENT

As the forward current through a silicon diode increases, the internal resitance

DECREASES

For a forward-biased diode, the barrier potential __________ as temperature increases

DECREASES

Effectively, how many valence electrons are there in each atom within a crystal?

EIGHT

Under normal conditions, a diode conducts current when it is

FORWARD-BIASED

Single element semiconductors are characterized by atoms with __________ valence electrons

FOUR

An n-type semiconductor material

HAS PENTAVALENT IMPURITY ATOMS ADDED

Doping of a semiconductor material means

IMPURITIES ARE ADDED TO DECREASE THE RESISTANCE OF THE MATERIAL

For a forward-biased diode, as temperature is __________, the forward current __________ for a given value of forward voltage

INCREASED, INCREASES

An insulator

IS A MATERIAL WITH FEW FREE ELECTRONS

As the forward current through a silicon diode increases, the voltage across the diode

IS RELATIVELY CONSTANT

Reverse breakdown is a condition in which a diode

IS SUBJECTED TO A LARGE REVERSE VOLTAGE

The most common type of diode failure is a(n)

OPEN

An ideal diode represents a(n) __________ when reversed-biased and a(n) _________ when forward-biased

OPEN, SHORT

What types of impurity atoms are added to increase the number of conductor-band electrons in intrinsic silicon?

PENTAVALENT

A diode conducts when it is forward-biased, and the anode is connected to the __________ through a limiting resistor

POSITIVE SUPPLY

An atom is made up of

PROTONS, ELECTRONS, NEUTRONS

What occurs when a conduction-band electron loses energy and falls back into a hole in the valence band?

RECOMBINATION

There is a small amount of current across the barrier of a reverse-biased diode. The current is called

REVERSE LEAKAGE CURRENT