X-ray circuits
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| line voltage compensator is incorporated into the primary circuit to: | maintain a constant kVp level
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| this meter measures the current passing between the electrodes of an x-ray tube | millammeter-seconds meter
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| 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
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| 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)
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| why are the majority of the components of the x-ray tube found in the primary circuit? | reduce the risk from electrical shock
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| type of current passing between the seconday of the high-tension transformer and the rectifiers | High voltage (kV) AC
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| large focal spot is used for settings above what mA? | 300 mA
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| higher mA= _______ current, _________ temp of the filament | higher, higher
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| the high tension transformer is located in an oil-filled tank that also houses the | rectifiers and filament transformers
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| an increase in kVp will also cause an increase in _____________ that requires the use of a _________________. | electron cloud, space charge compensator
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| this meter measures current | ammeter
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| main component of a line-voltage compensator that is capable of storing small amounts of electrical charge | capacitor
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| 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
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| most common device used to create the high potential difference across the x-ray tube | high tension transformer
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| reduction of voltage and development of high amperage by a step down transformer occurs in the | filament portion of the circuit
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| in a radiographic unit, the milliammeter will register only during the activation of the | second (exposure) stage of the exposure switch
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| which circuit? 110, 220, 440 volts | primary circuit
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| which circuit? 10-12 volts | filament circuit
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| which circuit? 25,000-150,000 volts | secondary circuit
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| 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
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| 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
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| power | watts
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| power formula | current X voltage= watts
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| 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)
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Created by:
kristinalyn
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