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X-ray Circuits
X-ray circuits
| Question | Answer |
|---|---|
| line voltage compensator is incorporated into the primary circuit to: | maintain a constant kVp level |
| this meter measures the current passing between the electrodes of an x-ray tube | millammeter-seconds meter |
| the voltage in the secondary circuit of a modern x-ray cicuit is how many times greater than in the primary circuit? | 1000 times higher |
| the high temps that are needed to produce the thermionic emission in the filament of an x-ray tube require a current of about: | 4-6 amps (temp of 2200 degrees celcius) |
| why are the majority of the components of the x-ray tube found in the primary circuit? | reduce the risk from electrical shock |
| type of current passing between the seconday of the high-tension transformer and the rectifiers | High voltage (kV) AC |
| large focal spot is used for settings above what mA? | 300 mA |
| higher mA= _______ current, _________ temp of the filament | higher, higher |
| the high tension transformer is located in an oil-filled tank that also houses the | rectifiers and filament transformers |
| an increase in kVp will also cause an increase in _____________ that requires the use of a _________________. | electron cloud, space charge compensator |
| this meter measures current | ammeter |
| main component of a line-voltage compensator that is capable of storing small amounts of electrical charge | capacitor |
| the pre-reading kV meter is incorporated into the x-ray control panel to measure the potential difference on the | seconary side of the high tension transformer |
| most common device used to create the high potential difference across the x-ray tube | high tension transformer |
| reduction of voltage and development of high amperage by a step down transformer occurs in the | filament portion of the circuit |
| in a radiographic unit, the milliammeter will register only during the activation of the | second (exposure) stage of the exposure switch |
| which circuit? 110, 220, 440 volts | primary circuit |
| which circuit? 10-12 volts | filament circuit |
| which circuit? 25,000-150,000 volts | secondary circuit |
| five main components of the high tension or high voltage circuit | transformer, the millampere-seconds (mAs) meter, the rectifiers, the high tension cables and the anode of the x-ray tube |
| why can you only obtain mAs meter readings immediately after an exposure? | tube current is only generated during the second phase of the x-ray production process |
| power | watts |
| power formula | current X voltage= watts |
| a transformer has 200 primary and 20,000 secondary turns of wire. what secondary voltage will be induced if 110 volts are placed on the primary coil? | 11,000 (11 kVp) |
Created by:
kristinalyn
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