ELECS-PPT-with-quiz

What is the most commonly used semiconductor material?

Silicon

A solid material in which the atoms are arranged in a symmetrical pattern is called __________.

Crystal

The sharing of valence electrons that holds the atoms together in a crystalline material is called __________.

Covalent Bonding

A __________ is a vacancy left by an electron in the valence band that has a unit positive charge.

Hole

The ability of free carriers to move throughout the material is referred to as __________.

Mobility

The process of altering the electrical properties of a semiconductor material by the addition of impurity atoms is known as __________.

Doping

region in a diode is devoid of charge carriers is called __________.

Depletion region

The types of semiconductors which have been refined to reduce the level of impurities to a very low level are called __________ semiconductors.

Intrinsic

A diode formed by joining a p-type and an n-type semiconductor is called __________.

PN-junction diode

Two types of carriers in semiconductors are __________ and __________ carriers.

Majority and Minority

The voltage that exists due to the electric field established by the charges in the depletion region is known as __________.

Barrier potential

The voltage at which significant current flows through a reverse biased diode

Breakdown voltage

A diode that conducts significant current when the anode is more positive than the cathode is said to be in __________.

Forward bias

The maximum voltage that a diode can sustain in reverse bias before entering the breakdown region is known as __________.

Peak inverse voltage

The process of converting AC voltage into pulsating DC is called __________.

Rectification

The saturation current in a silicon diode approximately __________ for every 10°C increase in temperature.

Doubles

The ratio of change in the diode voltage for a given change in the diode current is defined by __________.

Dynamic resistance

Typical Zener potential for Zener diodes ranges from __________ to __________.

5 V to 20 V

The ratio of output voltage changes when the load varies is referred to as __________.

Load regulation

Light Emitting Diodes (LEDs) emit light through __________ in the diode results to emission of light.

Recombination

The ________ of a semiconductor

material is between that of a good

conductor and that of an insulator

conductivity

Most solid-state devices in electronics

are made from

semiconductors

The orbits are grouped into energy bands known

as ________

shells

Between the valence and the

conduction band is the ________.

forbidden band

energy difference between the two bands

energy gap

other term for energy gap

band gap

the charge carriers in semiconductor materials

free electrons and holes

ability of free carriers to move throughout the material

mobility

The ratio of the change in the diode voltage for a given change

in the diode current, defined by the tangent line at the Q point

of the diode characteristic curve

Average AC resistance

Predominant capacitive effect in a reverse biased diode is the

Reverse capacitance

A diode circuit that removes a portion of the waveform

above/or below a specified level

Limiter

What component can be found in a clamper but not in a clipper?

Capacitor

What must be the time constant in a clamper circuit?

10 times

Special purpose diode designed to work in the

____________ region

breakdown

Used in voltage regulator circuits as ______________

reference voltage

The response of human eyes on visible light has a peak at what color?

Green

Which semiconductor has the most number of intrinsic

carriers per unit volume at room temperature?

Germanium

The current in a semiconductor is produced by

electrons and holes

Generally, what happens to the resistance of semiconductor materials when subjected to high temperature?

decreases

What is the maximum number of electrons that can occupy the third energy level of an atom?

18