Radiology
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| show | Direct current
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| show | They waste less energy
They are less delicate
There is a lower level of radiation
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| What is the purpose of the rectifier tube? | show 🗑
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| In the x-ray tube, what converts alternating current to direct current? | show 🗑
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| Which of the following is NOT present in a --A)vacuum tube? B)Anode C)Cathode D)Filament E)Generator | show 🗑
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| show | It has four electrons in the outer shell
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| What type of electrons does an n-type semiconductor have? | show 🗑
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| Which of the following is true of the n-type semi-conductors? A)It has free electrons B)It has electron holes C)It has fixed electrons D)All its electrons are free | show 🗑
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| show | Diodes
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| What has been developed to eliminate some of the unevenness that results from alternating current? (3) | show 🗑
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| What has been developed to eliminate some of the unevenness that results from alternating current? A)The use of high frequency current B)Three phase generators C)Full wave rectifiers D)All of the above | show 🗑
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| show | D)All of the above
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| show | Silicon
Boron
Phosphorus
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| What cycle of current is used in most x-ray equipment? | show 🗑
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| show | Anode
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| show | Cathode
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| show | Diode
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| show | Covalent bonding
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| show | Define
A small coil of wire through which current is passed. In a vacuum tube rectifier the filament is used to produce a stream of electrons
Filament
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| Define A process that occurs because of the cycling of alternating current. since only half the cycle flows through, half of the current is not used but is wasted. | show 🗑
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| show | Rectifier
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| show | Rippling
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| To operate, an x-ray tube needs what type of current? | show 🗑
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| show | Negative
Electrons continue flowing from the negative side, called the cathode, to the positive side, called the anode.
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| show | Anode
This is the end of the rectifier tube that attracts electrons from the filament.
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| show | Filament
Much of the energy of the alternating current is lost to heat that is generated in the filament.
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| show | Silicon
Silicon has four electrons in its outer electron shell, which allows for the creation of free electrons or electron holes when it bonds with other elements.
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| show | Boron
Since a boron atom has only three electrons in its outer shell, a positively charged hole can be created in the lattice.
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| show | Solid state rectifiers
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| show | Quantity and quality
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| show | Kvp
Ma
Exposure time
Meters
Line compensation
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| show | Kvp
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| Kvp determines the _____ of the beam. | show 🗑
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| mA determines the _____ of the beam. | show 🗑
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| show | Electromagnetic induction
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| What is the formula for the autotransformer law? | show 🗑
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| show | 4
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| show | Quantity
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| mA is the tube current from the _____ to the _______. | show 🗑
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| show | The primary side of the high voltage transformer
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| The number of x-rays reaching the image receptor is directly related to what two things? | show 🗑
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| show | High voltage transformer
Filament transformer
Rectifiers
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| show | Higher
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| In a high voltage transformer, the number of secondary winding is ____ than the number of primary windings (turns ratio). | show 🗑
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| show | Form 50:1 to 1000:1
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| show | The positively charged anode.
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| Is the filament made to withstand high heat? | show 🗑
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| Is the filament located on the cathode or anode side of the tube? | show 🗑
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