The cathode is a filament composed of
A. Tungsten
B. Lead
Copper
D. Aluminum
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What is the main purpose to make filaments into meander (flat) shape?
A. Quick to heat up.
B. To achieve a uniform X-ray intensity distribution.
C. Easy to manufacture
D. To produce enough filament current.
The primary purpose of the glass envelope of an x-ray tube is to_____.
A. Control leakage radiation.
B. Provide a vacuum.
Cool the tube.
D. Ensure against electric shock.
Which statement of followings is NOT correct about the relation between tube current and filament current?
A. They have a linear dependency.
B. The two currents are separated but interrelated via the space charges.
C. Tube current changes with the supplied tube voltage at constant filament current.
D. Tube current is measured in mA and filament current in A.
The purpose of an x-ray tube filament found in an x-ray circuit is to___.
Allow the current to flow in one direction only.
B. Increase or decrease voltage.
Create thermionic emission.
D. Measure tube current.
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