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physics ch 5 quiz qu
Question | Answer |
---|---|
primary purpose of the glass envelope of an xray tube is to | provide a vacuum |
the protective housing of an xray tube is designed to | reduce the hazard of leakage radiation |
diagnostic xray tube is an example of which of the following | diode (cathode and anode) |
the large filament is used during radiography when the heat load is | high and visibility of detail is less important |
most xray tubes, there are two filaments to | provide two focal spots |
once filament temp becomes adequate, a further small rise in filament temp will cause the tube current to | increase a lot |
the cathode beam of an xray tube is the | focused electron beam within the tube |
most xrays tubes used for radiography are | dual focus tubes |
when the filament burns out... | the filament current goes up |
the space charge effect is | occurs in the vicinity of the CATHODE |
stationary anode xray tube | incorporates the line focus principle |
heel effect occurs because of the | xray absorption in the anode |
the main reason for using the line focus principle is to | reduce focal spot size |
small target angles result in which of the following | small focal spot size |
tungsten is the choice material for xray anodes because of its | high atomic number (z) |
effective focal spot is | smaller than the actual focal spot |
what is a component of an electromagnetic induction motor | stator |
necessary properties of xray target material include which of the following | high melting points |
what is an advantage of the rotating anode tube over the stationary tube | higher heat capacity |
what components of the tube is on the positive side of the tube | anode (stator) |
as the anode target angle increases | effective focal spot increases |
stationary anodes will most likely be used in which of the following | dentistry (non diagnostic) |
what is not a function of the anode | thermionic emission |
high frequency= | 1.45 |
3p 6pulse= | 1.35 |
3p 12pulse= | 1.41 |