A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator. The central electrode, which may contain a resistor, is connected by a heavily insulated wire to the output terminal of an ignition coil or magneto.
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Michael Moore makes a new Trump prediction: He may quit 'before he even takes office'. After correctly predicting that Donald Trump would win the US presidency, Michael Moore has made a new prediction that Trump may not go on to serve out his term. The Oscar-winning director made waves back in July when he predicted that Trump would win, and now he says he takes no pleasure in being right.