Gas Gasoline And Oil Engines Including Complete Gas Engine Glossary a Simple
The book Gas Gasoline And Oil Engines Including Complete Gas Engine Glossary a Simple was written by author John B Rathbun Here you can read free online of Gas Gasoline And Oil Engines Including Complete Gas Engine Glossary a Simple book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Gas Gasoline And Oil Engines Including Complete Gas Engine Glossary a Simple a good or bad book?
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The incandescent vapor in the gap formed by this increase of temperatures causes the flash that is known as the spark. The temperature of the gap depends principally upon the current flowing through it, the amount of heat developed being proportionat to the square of the current. There is of course a practical limit to the amount of current used in the ignition apparatus to produce spark heat. The limit is generally set by considerations of the life of the bat- tery furnishing the current, expe...nse of generating the cur- rent, and the life of the contact points between which the spark occurs. 202 GAS, OIL AND STEAM ENGINES The heat developed by an electric current is proportional to the amount of resistance offered to its flow and the strength of the current employed. The greater the resistance, the more heat developed. The resistance of copper wire (the usual conducting path), being very low causes little rise in temperature, but the air in the opening or break has a resistance of many thousands of times the resistance of the copper; hence the current passing across the opening spark or gap raises the air to an exceed- ingly high temperature.
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