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.
President Trump has now fired 3 officials who were investigating his campaign or administration. Be the first to know about new stories from PowerPost. Sign up to follow, and weâll e-mail you free updates as theyâre published. Youâll receive free e-mail news updates each time a new story is published.
Donald Trump, the 69-year-old businessman best known for his âYouâre firedâ catchphrase on The Apprentice, announced he was running for president on Tuesday with an eccentric speech attacking Mexican immigrants and promising to build a great wall along the USâs southern border.