IP
the filament transformer is also known as the _______?
low voltage/step-down transformer
at the step-up transformer, kVp is ____, while mAs is_______?
kVp increased, mAs decreased
what is a synchronous timer?
capable of exposure times in multiple of 60
what is a Rheostat?
variable resistor in the filament circuit
what is the voltage ripple for 3-phase 6-pulse
13% voltage ripple
where is the filament transformer located?
within the low voltage filament circuit
at the step-down transformer, kVp is ________, while mAs is _______?
kvp decreased, mAs increased.
what is an electronic timer?
complex timer, accurate up to 1 millisecond.
how does a Rheostat work?
changes resistance in a circuit, current can the ne controlled.
what is the voltage ripple in 3-phase, 12-pulse?
4% voltage ripple
the filament transformer operates on the principle of ________?
mutual induction.
where is the exposure timer located in the x-ray circuit?
primary/low voltage circuit between secondary side of the autotransformer and the primary side of the step-up transformer.
what is a mAs timer?
establishes highest, safest mA at the shortest exposure time
what does a capacitor do?
stores electrical charge.
what is the voltage ripple for high frequency?
less than 1% voltage ripple.
at the step-down transformer, the filament wire is heated up, and allows what to occur?
thermionic emission
what is the purpose of the exposure timer?
provides a means of controlling the duration of a radiographic exposure.
what is an impulse timer?
measures exposure time in pulses of current
what is the voltage ripple for single-phase half-wave rectified?
100% voltage ripple
what is the job of the rectifiers in an x-ray circuit?
converts AC to DC
the primary purpose of the filament transformer is to ______?
adjust the amount of current and voltage supplied to the filament of the x-ray tube
what type of exposure timer is no longer used?
mechanical timer
what ia an AEC timer?
an ionization chamber placed between patient and the IR
what is the voltage ripple for single-phase full-wave rectified?
100% voltage ripple
why is rectification needed in x-ray tubes/circuits?
to ensure electrons flow in one direction (cathode to anode)