Q. The main disadvantage of having a small focal spot on an X ray tube is: (Solved)
1. Heat is conducted away too fast
2. Sharper radiographic images may be achieved with a larger focal spot
3. A smaller focal spot is limited to lower tube currents because of the potential damage from overheating
4. None of the above
- c. A smaller focal spot is limited to lower tube currents because of the potential damage from overheating