There's nothing in the U.S. Constitution that bars anyone with dual citizenship from becoming president, but the simple fact that Cruz could claim a Canadian passport or one day vote in a parliamentary election is unlikely to sit well with those who were already doing their best to dub him Canadian Ted..
Definition of transformer: Device that converts an alternating (A/C) current of a certain voltage to an alternating current of different voltage, without change of frequency, by electromagnetic induction. A 'step up' ...
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. A varying current in one coil of the transformer produces a varying magnetic field, which in turn induces a voltage in a second coil. Power can be transferred between the two coils through the magnetic field, without a metallic connection between the two circuits. Faraday's law of induction discovered in 1831 described this effect.