Final answer:
To increase 60 kVp to 75 kVp, there is a change in voltage of 15 kVp. This increase in voltage results in an increase in energy and penetration power for electrons and x-ray photons.
Step-by-step explanation:
To increase the voltage from 60 kVp to 75 kVp, the change in voltage is calculated by subtracting the initial voltage from the final voltage. Therefore, the change in voltage is 75 kVp - 60 kVp = 15 kVp. This increase in voltage will result in an increase in the energy of the electrons and x-ray photons produced. The increase in voltage allows for greater penetration power, which can be useful for certain medical imaging procedures.