Increasing voltage after ionization does not lead to nuclear explosions, as ionization is primarily an electronic phenomenon rather than a nuclear one. While high voltage can cause rapid plasma expansion, it does not result in an explosion under nuclear conditions. Instead, excessive voltage can overheat conductors, leading to melting rather than burning, as burning requires an oxidizer like oxygen. High enough voltage can theoretically induce nuclear reactions by accelerating fully ionized nuclei, but this requires significant voltage levels, such as those demonstrated by Cockcroft and Walton at 125 kV. Overall, while increased voltage affects ionized gases, it does not equate to nuclear explosions.