the filament circuit

Question 1

Controls the filament current that will be supplied to the filament of the x-ray tube. This current controls the temperature of the filament.

Answer 1

the filament circuit

Question 3

as filament current increases, the filament becomes hotter, and more electrons are released by _____

Answer 3

thermionic emission

Question 4

it is measured in amperes (A). filament operates at currents between 5 to 7 A

Answer 4

the filament circuit

Question 5

the filament circuit consists of of (3)

Answer 5

1. mA selector (Rheostat)
2. focal spot selector
3. step-down transformer

Question 6

reduces the voltage supply from the auto transformer by varying the resistance through the circuit

Answer 6

mA selector/ rheostat

Question 7

-it is controlled by the mA selector on the operating console. the higher the mA station lower, the resistance, the lower, the mA station, the higher, the resistance.
-typically, current of about 0.5 to 1 A is supplied to the primary side of the transformer

Answer 7

mA selector/ rheostat

Question 9

• selects the filament (small or a large) that will be heated, which corresponds to the focal spot size
• connected to the primary windings of the step-down transformer

Answer 9

focal spot selector

Question 10

decreases the voltage and increases the current that is supplied to heat the filament of the x-ray tube.

Answer 10

step-down transformer

Question 11

The primary windings carry a voltage of 150 V at a current of 0.5 to 1 A, and the secondary windings carry a voltage of 12 V at a current of 5 to 8 A

Answer 11

step-down transformer