Electron Control Devices Pt 2

Transformer

A ____ is a device used to increase or decrease the voltage in an ac circuit.

Switching Transistor

A _____ is similar to an electric solenoid or relay; that is, it can act as remote-control switch.

Zener

A ______ diode will conduct electricity only under certain voltage conditions; hence it is ideal for use in voltage regulator circuits.

Rectifier

A ______ is a device that allows current to flow in one direction but will oppose, or stop, current flow in the opposite direction.

Thyristor

A ______ is a semiconductor that is used for switching purposes.

Positive

A pulse of _____voltage applied to the gate of a silicon controlled rectifier to cause it to conduct.

Base

A small change in the ____ current produces a large change in the load current in a transistor amplifier.

Control

A three element solid state device may be used as a ______ valve in a circuit.

Voltage

A zener diode may be used as a _____ sensor in a solid-state voltage regulator.

Gain

Amplification in a transistor is called _____.

Can

If a semi-conductor diode is forward biased, electrons ____(can or cannot) flow through it.

Full-Wave

In order to change both halves of the AC cycle into DC, we must use a _____ rectifier.

Printer Circuit Boards

Modern electronic equipment uses _____, which provide a mounting surface and the electric current paths for the individual components of a system.

Transistor

The ______ is a very small solid-state device that takes the place of, and will do the work of, a much larger electron tube.

Check Valve

The diode acts as an electron ______.

Eddy Currents

The laminated core on a transformer is to reduce _____, which otherwise would cause considerable heat and a loss of power.

Cathode

The n-type material of a diode is known as the ______ and is the electron emitter, or negative connection.

Depletion Region

The p-n junction is also referred to as the _____.

Anode

The p-type material of a diode is the ______ and is the electron acceptor, or positive connection.

Silicon

The principal semiconductor materials used for rectifiers are _____ and germanium.

Solid-State

The term _______ refers to a device in which a solid material is used to control electrical currents through the manipulation of electrons.

Diode

The two-element vacuum tube is known as a _____.

Doping

To make germanium or silicon capable of carrying a current, a small amount of another element is added, this is called _____.

Direct, Alternating

Using a magnetic amplifier, a small amount of _____ current may be used to control a large amount of _____ current.

Reverse-Biased

When a diode is connected in such a way as to prevent conduction, it is ______.

Forward-Biased

When a diode is connected in such a way that it conducts it is _______.

Half-Wave Rectification

When a single rectifier (diode) is placed in series with an ac circuit, the result is called ______.

Break Down

When a specific voltage is placed across a zener diode in its reverse bias direction, it will ______ and conduct.

N-Type

When germanium is treated with antimony, the resulting material is called ______ germanium because it contains extra electrons.

Step-Up

When the secondary of a transformer has more turns of wire than the primary and is used to increase voltage, the transformer is called a _____ transformer.

Step-Down

When the transformer is used to reduce voltage it is called a _____ transformer.

Junction

When the two types of germanium or silicon are joined, a ____ is formed.

Thermistors

_____ are heat-sensitive devices used on some aircraft to monitor the temperature of certain electrical equipment.

Photodiodes

______ are semiconductors that respond to light.

Amplification

_______ is another function commonly performed by transistors and is defined as an increase in a signal's power.