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.