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When using the exposure switch, before pressing button completely down to take an exposure what are we warming up/causing to spin prior to exposure?

Ionization chambers used during AEC, are placed where in the exposure process?  

XR photon production occurs at the:  

The ______________________ asembly adjust the size and shape of the XR exposure field emerging from the tube.  

The ____________________ controls the amount of resistance in the filament circuit. 

When full-rectification is applied, how many diodes are required as a minimum?  

What is the power rating of a 3-phase generator capable of delivering 150 kVp at 1000 mA to the XR tube?

How many heat units are produced with a single exposure using a 3 phase 6 pulse XR unit, 80 kVp, 300 mA, and 0.4 sec?

Determine if the following exposure of 125 kVp @ 250 mA for 1 sec is recommended using the departments XR tube with the following specifications: Single-phase, 3400 rpm, 11-degree anode angle, and 1 mm focal spot

The unit of mass is the?