Filament materials are chosen for their______.①High Melting Point ②Low Melting Point ③Ability to Vaporize Easily ④High Atomic Number
A. Numbers 1 & 3 only
B. Numbers 2 & 3 only
C. Numbers 1 & 4 only
D. Numbers 2 & 4 only
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The cathode is a filament composed of
A. Tungsten
B. Lead
Copper
D. Aluminum
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.
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