Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
What is rectification
|
The process of changing AC to pulsating DC
|
A. Supresses the negative phase of the sine wave
B. Inverting the negative sign of the sign of the sine wav |
|
|
What are the 2 types of rectification
|
Self rectification- X-ray tube
|
Solid State Rectificaftion- Diode
|
|
|
What is a capacitator
|
A device capable of accumulating and storing an electric charge
|
1. Works by applying direct current
2. Must be charge to operate 3. Usually charged by a battery 4. Used in mobile radiography |
|
|
What are autotransformer
|
Portions of the same winging acts as part of both the primary and secondary winding
|
|
|
|
What are the 3 types of transformer loss
|
1. Copper Loss- Resistance to current flow that is found in all conductors
2. Hysteresis Loss- Minimized by using silicon iron |
3. Eddy Current Loss- Minimized by using laminated core
|
|
|
What are the 4 types of transformer cores
|
1. Air core
2. Open core 3. Closed core 4. Shell type |
|
|
|
What are the 2 types of transformers
|
1. Step-up transformer- Increases voltage and decreases amp
|
2. Step-down transformer- Decreases voltage and increases amp
|
|
|
What are the components of transformers
|
1. Two coils of a wire with soft iron cores
2. Sources of AC attached to one wire |
|
|
|
What does transformer do
|
Work on the principle of electromagnetic mutual induction
|
All transformers work on AC to provide establishing, collapsing, and reestablishing of magnetic field
|
|
|
What is the basic theory of motors
|
Convert electrical energy to mechanical energy`
|
|
|
|
Define Armature
|
Loop of wire
|
|
|
|
What is a tectifier
|
Changing AC to DC before gettingt to x-ray tube
|
AC going into rectifier and coming out as DC
|
|
|
What is a half wave rectificaftin
|
Half waves uses 1 diode 1/60 sec
|
|
|
|
What is a full wave rectificaftin
|
Full waves uses 4 diodes 1/120 sec
|
|
|
|
What is the purpose of a semiconductor
|
Allows flow of electrons in one direction, it is done by n-p junction
|
|
|
|
Why do we use a galvometer
|
A scale used to work kv and mas meters
|
|
