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.
Spread butter on corn, salt and pepper, wrap in foil in cook at 375 until done. I am not sure how long it will take but at least 30 minutes. Preheat over to 450 degrees F. Pull down corn husks to remove silk and soak for 10 minutes in enough sugared water to cover. Replace husks and close with a twisting motion or tie closed. Place the ears in the oven and bake 15 to 20 minutes. Remove husks prior to serving, and serve with butter and salt and pepper. Remove husks and silks from corn. Place each ear of corn on a piece of heavy duty aluminum foil, and drizzle with a little butter.