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From Longman Dictionary of Contemporary English
Related topics: Electrical
transformertrans‧form‧er /trænsˈfɔːmə $ -ˈfɔːrmər/ noun [countable]  TEEa piece of equipment for changing electricity from one voltage to another
Examples from the Corpus
transformerSignal voltage gain is always accompanied by greater signal current attenuation and viceversa with a transformer.But new designs, which do without costly transformers, have trimmed prices.This causes the beam to bend and the displacement is measured by means of a strain gauge or a differential transformer.The potential differences between B, C and D are again very small, arising only from small losses in the transformer.Apparently crews were trying to repair a small outage affecting 1,640 customers in the Mission when the transformer went out.
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