mro m7, s4 activities and quiz

radt151

The filaments are wired to which circuit section?

filament circuit

What determines which filament is selected?

mA station selected

The boiling off of electrons is called:

thermionic emission

Generally, an x-ray tube will have how many filaments?

2

What is added to the filament to increase thermionic emission?

thorium

Why do we limit the smaller filaments to the lower mA stations?

less heat produced with smaller stations and techniques

Small changes in filament current will cause large changes in tube current.

true

How does the focusing cup "focus" electrons on the anode

by electrostatic repulsion