Introduction to Electrical Devices Flashcards

1
Q

Circuits are analyzed according to 4 characteristics in a circuit. What are they?

A

Current
Resistance
Voltage
Power

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2
Q

What are Component Diagrams used for?

A

Show the physical relationship between components or to show components of a circuit when the reader might not be familiar with those components.

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3
Q

Component diagrams are also called ?

A

Pictorial Diagrams

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4
Q

What are the two general types of resistors?

A

Fixed

Variable

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5
Q

What is a fixed resistor?

A

Resistor that has a value that is set and not adjustable

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6
Q

What is a variable resistor?

A

A resistor that can have its value changed

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7
Q

There are 4 important numbers associated with any type of resistor, what are they?

A

Resistance Value
Power Rating
Tolerance
Reliability

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8
Q

What is the Power Rating of a Resistor stating?

A

Amount of Power that can be dissipated by the resistor without damaging the resistor or affecting its operation

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9
Q

The Tolerance of resistor is affected by ?

A

Variation in building materials

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10
Q

Name 4 types of fixed Resistors

A

Composition Carbon
Metal Film
Metal Glaze
Wire-Wound Resistor

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11
Q

Most common type of fixed resistor?

A

Composition Carbon Resistor

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12
Q

Fixed Resistors have a color code to ?

A

Indicate the value of the resistor.

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13
Q

What are the two common color band configurations for fixed resistors?

A

4 band configuration

5 band configuration

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14
Q

The lower the percentage tolerance in a resistor…..

A

The more precise the resistor value and the higher the cost

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15
Q

In a 4 band color code what is the purpose of each band?

A
1- first digit
2- second digit
3- multiplier
4- Tolerance
5- Reliability
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16
Q

In a 5 band color code what is the purpose of each band?

A
1- first digit
2-second digit
3-third digit
4-Multiplier
5-Tolerance
17
Q

Wire-Wound resistors are best for

A

applications requiring high temperature and high power

18
Q

Another term for variable resistor is ?

A

Potentiometer

19
Q

What is a Potentiometer?

A

A variable resistor with three terminals. Used to Adjust the applied voltage.

20
Q

What is a rheostat?

A

A variable resistor with 2 terminals. Strictly used to vary the amount of current that flows to a circuit.

21
Q

A Potentiometer can be used as a Rheostat?

A

Yes because it has three terminals, one more additional, than a rheostat. Must use two of the three terminals.