Midterm And Things Flashcards
What is the equation for turns ratio as it pertains to voltage?
Ns/Np=Vs/Vp
What is the equation for turns ratio as it pertains to current
Ns/Np=Ip/Is
The relationship between turns ratio and current?
Inversely proportional
Relationship between turns ratio and voltage
Directly proportional
Step up transformers have a turns ratio greater than or less than 1?
Greater than
Step down transformers have a turns ratio greater than or less than 1
Less than
Self induction
The induction of a opposing EMF in AC coil by its own magnetic field.
What are the two types of AECs
Ionization chamber type and photomultiplier tube type
Line compensation
Adjusting voltage in X-ray system to keep it value
What are the manual timers
Mechanical, synchronous, electronic and mas timers
What is a mechanical timer
Operating by clockwork. Min exposure time .25s
Synchronous timers
Also mechanical depends on electric motor 60 revs/s. Exposure multiples of 1/60
Electronic timers
As short as 1ms controls mas. Highly accurate.
MÁS timers
Monitor current through tube and located
Has extra free electrons
N-type
Has a deficiency of electrons
P-type
Where is the rectifier located
In between the auto transformer and tube
Suppresses the inverse wave of the current
Self rectifier
Uses 1-2 rectifiers and produces half wave voltage form
Half wave rectifier
Contains at least 4 rectifiers and they invert ac pulses so that all of the electricity is used
Full wave rectifier
Mutual induction
The induction of current flow in a wire by another moving mag field of another coil.
Transformer operates on the principle of
Mutual infuction
In what ways can you get power loss in transformer
Copper loss, eddy currents, and hysterisis loss
Electric generators
Transform mechanical energy to electric
