A control apparatus for an internal combustion engine according to the present invention includes a spark plug (30) for igniting an air-fuel mixture in a cylinder, and is configured to be capable of measuring a discharge voltage of the spark plug (30). The...

The size of the plasma produced by a plasma-generating device that generates plasma using electromagnetic (EM) radiation is enlarged. The plasma-generating device has an EM-wave-generating device that generates EM radiation, a radiation antenna that emits ...