What changes alternate current from low to high voltage and high to low voltage
Transformer
What is the difference between self induction and mutual induction?
Self: single wire
Mutual: two wires
What is the difference between the primary and the secondary coils?
Primary: supplied with the alternating current (input side)
Secondary: devolps AC by mutual induction (close but not touching)
What is step up vs a step down?
Step up: secondary has more turns than primary turns
Step down: primary has more turns than secondary turns
List and describe the four types of transformers
1) air core: 2 insulated wires side by side
2) open core: iron core inserted into wires
3) close core: insulated wires wound around iron ring
4) Shell: primary and secondary wrapped around a central section (wires insulted from each other)
How efficient are transformers?
95% efficient
in what form is this loss of inefficiency in transformers?
Heat
Energy loss due to heat from resistance?
copper loss
Swirling of energy within iron shell because we have AC (current creates flux)
Eddy current loss
Tiny domains in iron shells are repeatedly magnetized
hysteresis loss
What is the purpose of autotransformers?
KV selection
What principle of induction does the autotransformer operate under?
Self induction (single coil)
What is the location of the autotransformer in relation to the transformers and the tube?
first thing in x-ray circuit
What is the current and voltage of the filament circuit?
current: 3-5 amps
filament: 10-12 volts
Whats the rheostat and how does it influence the current?
Rheostat is the switch and influences the resistance based on the length of the conductor rules
What are the parts of autotransformers?
kv selection, taps, self induction, variable transformer
2 insulated wires side by side
air core
iron core inserted into wires
open core
primary and secondary wrapped around a central section (wires insulted from each other)
shell
insulated wires wound around iron ring
close core
