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#10: If approximately 1% of the electric energy ends up in the x-ray beam ( a typical value), what is the approximate total energy of the xrays emitted?

A: 500J B: 50J

C: 5J D: 0.5J

Electrons
Vacuum
tube
Typical values for a dental x ray are a kVp of 70 (meaning a
peak voltage of 70 kV) and mAs of 7.5 (which comes from a cur-
rent of 10 mA for 0.75 s, for a total of 7.5 mAs). Assume these
values in all of the problems that follow.
Tаrget
electrode
Cathode
FIGURE VI.1

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