Introduction The Reason and Use of Transformers A transformer is a device that raises or lowers voltage and is used mostly with alternating current, or ac. A transformer has no moving parts, is simple, rugged, durable, and can be up to ninety-nine percent efficient. Cities use a large amount of power, and power is based on the amount of current in electricity. A transformer works by changing the amount of voltage and current of electricity. …showed first 75 words of 1324 total…

…showed last 75 words of 1324 total…large that the average person would never be able to afford it. (Nadon 1999) Types of Iron/Steel and Air Coreand Their Efficiancy Iron/Steel Core Type Average Efficiancy AirCore type Average Efficiancy Shell-type 80-90% Air core 0-50% H-type 99-100% Wound core-type 90-100% (Schuler 1999) Works Cited Schuler, Charles A., et al. Electronics Principles and Applications. New York: Glencoe/McGraw-Hill., 1999 Nadon, John M. Industrial Electricity. Albany: Delmar Publishers., 1999 “Transformers.” Electrical Shack. January 1999 http://www.geocities.com/siliconvalley/3424/