| Answer | Crossword Clue |
|---|---|
| EDISON | Noted proponent of direct current |
| TESLA | Noted proponent of alternating current |
| TESLA | Early proponent of alternating current |
| TESLA | Alternating current proponent |
| EDDIED | Wasn't a direct current |
| INVERTER | It turns direct current into alternating current |
| RECTIFIER | Device for converting alternating current into direct current |
