These effects are derived from two fundamental observations of physics: a steady current creates a steady magnetic field described by Oersted's law, and a time-varying magnetic field induces an electromotive force in nearby conductors, which is described by Faraday's law of induction.
Butter & salt. Preheat the oven to 400 degrees. Husk the corn, wrap each ear in foil, adding 2 teaspoons of butter to each packet. Bake for about 25 minutes or roast the foil-wrapped corn over hot coals turning once during the cooking. Serve with more butter and salt.
1 Stir into the butter mixture along with the lime juice and hot sauce until evenly blended. Brush the ears of corn generously with the garlic butter; reserve remaining butter.  Cook the corn on the preheated grill, rotating occasionally until the corn is hot and tender, 10 to 15 minutes.