For one medium to large ear, we'd start with three minutes on high. For two ears, try four minutes. The husks trap the heat and steam the corn, which means peeling them back as soon as the corn comes out of the microwave is hot, dangerous work. Let them sit for a few minutes, then grab them with a kitchen towel and shuck carefully.
We find our corn is just as sweet and tender as when we boil it, and the silks seem to come off more easily once they're steamed. It's also a good way to cook just one ear without having to dirty a pot.
Anyone else do this? How do you usually cook corn?