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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Over the last several weeks, the Trump administration has endured a hurricane of controversy. Key resignations, challenges in filling his Cabinet, and other crucial federal positions, fights with the press, US intelligence agencies, and his critics have all culminated thus far in a tumultuous first month in office for President Donald Trump.