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Criado por That Yeti Dog Person
aproximadamente 4 anos atrás
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A material is called a ______ if electricity can flow through it easily. (an example of this is copper)
Some materials, such as rubber, are called ______ because they have very high resistance to the flow of energy.
______ is the flow of electrons in a medium. (such as copper)
Current is measured in units called ______.
______ is the abbreviation of amperes.
______ is the electrical pressure that forces electrons to flow through a medium.
Voltage is measured in units called _____.
______ is the abbreviation for volts.
______ is the opposition to current flow presented by a medium.
Resistance is measured in units called ______.
Ohms is often represented by the Greek letter ______.
____________ are used by technicians as a form of "shorthand" to show how components are connected in circuits.
_______ has a high resistance to current flow. It is often used as a heating element. (such as in a toaster)
Heating elements are also called _________.
The resistive element in a _______ resistor is carbon mixed with a non-conducting substance, such as clay. In this type of resistor, the ratio of carbon to clay determines how much resistance it will have. (the more clay, the more resistance)
The ______ resistor uses nichrome wire as the resistive element. In this type of resistor, resistance value can be varied by making the wire longer or thinner. (the longer & thinner the wire, the more resistance)
Batteries are a common source of ______ current.
_____ is the abbreviation for direct current.
Ordinary household current is ______ current.
______ is the abbreviation for alternating current.
One complete reversal of AC is called a _____.
The rate at which AC cycles occur is called the ______.
Frequency is measured in units called ______.
_____ is the abbreviation for hertz.
Most electronic equipment runs on _____ current.
To turn AC current to DC current, it needs to be ______.
In many circuits, the process of rectification is completed by a component called a _____.
The action of converting AC current to DC current is called ______.
Diodes are often called ______.
The two ends of a diode are called the ______ and the ______.
A diode will always be marked in some way to identify its ______ end.
The ______ end of a diode must be connected to the negative side of the voltage source in order for it to conduct electricity.
______ are a broad group of components that are used to convert some kind of environmental energy into electrical signals. (such as in a thermostat)
A ______ is a resistor that responds to temperature changes by changing its resistance.
A transistor had three leads: ______, ______, and ______.
The most basic operation of a transistor is _______.
On a printed circuit board, the components will be mounted from the ______ side of the board.
The substrate side of a printed circuit board is also called the ______ side.
The side of a printed circuit board that contains the conducting paths is called the ______ side.
A ______ is used to measure electrical values such as ohms, amperes, and volts in circuits.
Faults in electrical equipment often occur in the sections where voltages are converted. In these cases a piece of test equip. called a ______ can be used to test the device.
Electrical test equipment with screens that display readouts in digits have ______ displays.
Electrical test equipment with displays that use pointers and scales to give readouts have ______ displays.
The ______ is an instrument that measures electrical signals and displays them on a tv-like screen.
A ________ is a troubleshooting tool that's used to produce simulated electronic signals in a circuit.
