Hi guys, I'm Ralph and welcome to my YouTube channel. Please subscribe to this channel and also turn on the notification bell so you can get alerted when I make a new upload. And also don't forget to like, comment and share my videos to your friends and families. Oh and also follow me on Instagram. Ralph, a manx. So, I guess we should move on to today's video. And in today's video we are going to talk about the spark plug. So, spark plugs are used to ignite fuel in gasoline or petrol internal combustion engines. Spark plugs are not required in diesel engines. Internal combustion engines can be split into two ignition categories. These are spark ignition, also gasoline or petrol engines, and compression ignition, also diesel engines. Spark plugs are installed within the cylinder head and are attached by screwing the spark plug into the head. Careful attention must be paid when tightening the spark plug to the head. Otherwise the thread may become stripped and tightening will no longer be possible. So, here is the spark plug cross section. It has the center electrode, insulator, screw thread, and ground electrode, high voltage 20 to 40, 00 volts, is applied to the terminal connection at the top of the spark plug in order to raise the electrical potential of the center electrode. Electrical current flow through the center electrode into bracket copper conductor usually, and through a resistor. The high voltage present in the center electrode causes the gases within the electrode gap to become ionized. When the gases are ionized they become a much better conductor and the electrons are then able to jump the electrode gap in order to reach the ground electrode. The jump can be seen as the spark and this is where the spark plug obtains its name. The proper technical name for this jump is arg. Spark plugs spark gap. The arg between the center and ground electrode contains enough energy and heat to ignite the air or fuel mixture within the combustion space. Depending of the fuel occurs at approximately 5 degrees before top dead center into bracket, TDC, and signifies the start of the power stroke. A question is what is the purpose of the resistor in a spark plug? But not all spark plugs contain a resistor, but almost all automobile spark plugs do. The resistor reduces the amount of electrical noise created by the spark plug. Electrical noise is also referred to as electromagnetic interference into bracket, EMI, or radio frequency interference into bracket, RFI. Because the spark plug is effectively a conduct, it creates its own magnetic and so does the electrical arc created by the spark plug. These electromagnetic fields can interrupt other nearby electronic circuits and cause adverse effects. In order to reduce the likelihood of EMI which is the electromagnetic interference on items such as the engine control unit the AQ. Car, radio and other electronic circuits, a resistor is installed. What is a spark plugs, heat range? Thanks for watching. And see you in my next video, where I will bring the answer to the question. Please subscribe.