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What is An increase in kVp increases the : and explain in detail?
Increasing the kVp of an x-ray machine increases:

The number of photons generated.
The mean energy of the photons.
The maximal energy of the photons.

Ref:Ref: Oral Radiology, Principles and Interpretation / Stuart C. White, Michael J. Pharoah - 7th ed - pg - 10