Introduction to Electrical Devices Flashcards
Circuits are analyzed according to 4 characteristics in a circuit. What are they?
Current
Resistance
Voltage
Power
What are Component Diagrams used for?
Show the physical relationship between components or to show components of a circuit when the reader might not be familiar with those components.
Component diagrams are also called ?
Pictorial Diagrams
What are the two general types of resistors?
Fixed
Variable
What is a fixed resistor?
Resistor that has a value that is set and not adjustable
What is a variable resistor?
A resistor that can have its value changed
There are 4 important numbers associated with any type of resistor, what are they?
Resistance Value
Power Rating
Tolerance
Reliability
What is the Power Rating of a Resistor stating?
Amount of Power that can be dissipated by the resistor without damaging the resistor or affecting its operation
The Tolerance of resistor is affected by ?
Variation in building materials
Name 4 types of fixed Resistors
Composition Carbon
Metal Film
Metal Glaze
Wire-Wound Resistor
Most common type of fixed resistor?
Composition Carbon Resistor
Fixed Resistors have a color code to ?
Indicate the value of the resistor.
What are the two common color band configurations for fixed resistors?
4 band configuration
5 band configuration
The lower the percentage tolerance in a resistor…..
The more precise the resistor value and the higher the cost
In a 4 band color code what is the purpose of each band?
1- first digit 2- second digit 3- multiplier 4- Tolerance 5- Reliability