Final answer:
Increasing the mA in a CT scan increases the intensity of the X-ray beam.
Step-by-step explanation:
Increasing the mA in a CT (Computed Tomography) scan has the effect of increasing the intensity of the beam. mA stands for milliamperes, which is a measure of the current passing through the X-ray tube. By increasing the mA, more X-ray photons are produced, resulting in a higher intensity of the X-ray beam.