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Physic 2 Unit 1 HW

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
show High frequency  
🗑
To generate three-phase, six pulse power, at least how many rectifiers are necessary?   show
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A semiconductor rectifier:   show
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show 60 negative pulses per second  
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show 100% for self-rectification  
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A rectifier Converts   show
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show Electron flows in one direction but not in the other  
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If 60Hz AC power if full-wave rectified, output voltage consists   show
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The current from a common household wall receptacle in the United States is   show
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show Electron emission from a heated source  
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show ------>1--------  
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show A greater number of x-rays per cycle  
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show 360  
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show 100%  
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High frequency   show
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show 13%  
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Three phase, twelve pulse   show
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show 100%  
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Power to the primary side of the high-voltage transformer comes from the   show
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The output voltage from the autotransformer   show
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The autotransformer converts   show
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show Faradays law  
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show Increase voltage  
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show High-voltage transformer  
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The autotransformer has only one   show
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show Adjust voltage  
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show kVp meter  
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show line compensation  
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The autotransformer can be used to do which of the following?   show
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In the design of an autotransformer   show
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show Requires that constate voltage be supplied to the autotransformer  
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show is required to stabilize voltage  
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show An autotransformer  
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show Increases current  
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The filament transformer is usually   show
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The filament circuit   show
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The unit mAs   show
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An exposure technique of 100 mAs at 100 ms compared with 50 mA at 50 ms results in   show
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The control of the focal spot size depends on   show
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show physically located on the control console  
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show milliamperes (mA)  
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show with a turn ratio less than 1  
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Which of the following would be correct to use for expressing x-ray tube current?   show
🗑
show precision resistors  
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show Electric charge  
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A radiographic technique calls for a 50ms exposure, but the exposure control has only fractional notation. Which of the following should be selected?   show
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show 20 mAs  
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If an x-ray imaging system is operated at 600mA, 50ms, the total mAs will be which of the following?   show
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show 1/20s  
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operation at 300mA for 1/20 s is equivalent to operation at 900 mA for   show
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The control of exposure time always   show
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show be electric  
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show can use an ionization chamber between the patient and the image recpyor  
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show A back up timer is required  
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show 8 ms  
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Mammography sometimes requires exposures as long as 1.5s.This is equivalent to which of the following?   show
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show 1/1000  
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There are 30 video frames each seconds for a fluoroscopic CRT dynamic image. What is the length for each frame?   show
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show 200ms  
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show 250ms  
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show diode rectifier  
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show Amplitude  
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show None  
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Which of the following is higher for a single-phase high voltage generator than for a three-phase high voltage generator?   show
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show High capital cost  
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show its limited exposure time  
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show Produces twice as much radiation if full-wave rectified than if half wave rectified  
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Full wave rectification   show
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show can be a semiconductor  
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Concerning the transformer used in the x-ray circuit   show
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show increased x-ray intensity per mAs  
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show Electrical insulation  
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Which power supply should provide the highest quality x-ray beam?   show
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show 100%  
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half wave rectified power   show
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high frequency power   show
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show 13%  
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Three phase 12 pulse power   show
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