Question 1

____ diodes are used to provide voltage regulation.&#10;A) Regulating&#10;B) Zener&#10;C) Photo&#10;D) Light-emitting

Accepted Answer

Zener diodes are designed to operate in the reverse breakdown region, allowing them to maintain a stable voltage output despite changes in current flow. This makes them ideal for voltage regulation.

Question 2

An SCR looks very similar to a diode except that there is an extra ____.&#10;A) terminal&#10;B) junction&#10;C) anode&#10;D) cathode

Accepted Answer

An SCR (Silicon Controlled Rectifier) looks very similar to a diode except that there is an extra terminal called the gate.

Question 3

A(n) ____ changes its internal resistance when its surface is struck by light.&#10;A) photoconductive cell&#10;B) light-emitting diode&#10;C) zener diode&#10;D) bipolar junction transistor

Accepted Answer

A photoconductive cell is a type of semiconductor device that changes its electrical conductivity when exposed to light. This change in conductivity is due to the generation of electron-hole pairs in the semiconductor material, which can increase the device's internal resistance when light is shone on it. Light-emitting diodes, zener diodes, and bipolar junction transistors do not exhibit this behavior.

Question 4

A diode is a three-terminal device.

Accepted Answer

A diode is a two-terminal device, consisting of an anode and a cathode.

Question 5

An N-type material contains free electrons.

Accepted Answer

N-type materials are doped with impurities such as phosphorus or arsenic, which have one more electron in their outer shell than the atoms in the semiconductor crystal. These extra electrons become free to move through the material, making it an N-type material.

Question 6

A diode will only conduct current when forward biased.

Accepted Answer

A diode is a semiconductor device that allows current to flow in only one direction. When it is forward biased (positive voltage applied to the p-terminal and negative voltage applied to the n-terminal) it will conduct current. However, when it is reverse biased (negative voltage applied to the p-terminal and positive voltage applied to the n-terminal) it will not conduct current.

Question 7

The bipolar junction transistor (BJT) is a(n) ____ terminal device.&#10;A) one&#10;B) two&#10;C) three&#10;D) four

Accepted Answer

A bipolar junction transistor (BJT) is a three-terminal device consisting of the emitter, base, and collector.

Question 8

The AC component that causes the pulsating voltage is called the ____.&#10;A) vibration&#10;B) oscillator&#10;C) wave&#10;D) ripple

Accepted Answer

The AC component that causes the pulsating voltage is commonly referred to as ripple. It is the small variations of an AC voltage or current that remains after a DC voltage or current has been filtered out.

Question 9

Adding an impurity such as arsenic or indium causes a semiconductor to take on very different characteristics. This process is called ____.&#10;A) impuritizing&#10;B) doping&#10;C) refining&#10;D) amalgamating

Accepted Answer

The correct term for adding an impurity to a semiconductor is "doping". It is important to note that doping changes the electrical properties of the semiconductor, making it more conductive or less conductive depending on the type of impurity added.

Question 10

A diac does not conduct until a threshold ____ is reached.&#10;A) inductance&#10;B) resistance&#10;C) current&#10;D) voltage

Accepted Answer

A diac is a two-terminal device that does not conduct until a threshold voltage is reached, after which it will conduct current in both directions. This makes diacs useful in triggering triacs and other SCR devices.

Question 11

It is not unusual for transistor amplifiers to have a gain of ____.&#10;A) 10&#10;B) 50&#10;C) several hundred&#10;D) several thousand

Accepted Answer

The answer of It is not unusual for transistor amplifiers...

Question 12

When DC voltages must have little or no ripple, a filter is used to smooth out the pulse.

Accepted Answer

The answer of When DC voltages must have little or...

Question 13

A full-wave rectifier has a DC output voltage during one half of the AC input voltage.

Accepted Answer

The answer of A full-wave rectifier has a DC output...

Question 14

Conversion of AC input voltage into a DC output voltage is called ____.&#10;A) rectification&#10;B) ripple&#10;C) emittance&#10;D) amplification

Accepted Answer

The answer of Conversion of AC input voltage into a...

Question 15

An impurity that causes a shortage of electrons is called a(n) ____.&#10;A) doper&#10;B) receiver&#10;C) acceptor&#10;D) contributor

Accepted Answer

The answer of An impurity that causes a shortage of...

Deck 21: Basic Industrial Electronics