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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Trump is Already a Failed President as Voters Think He Will Be Worst Since Nixon. Not even a week fully in office yet, and President Trump has managed to make history again with historically awful numbers for a newly elected President, according to a new Public Policy Polling poll. Things are so grim for the new President that voters think he will be the worst president since Nixon.