2006-12-10 09:18:40 · 3 answers · asked by snakexxx25 1 in Science & Mathematics ➔ Engineering
Depends on the internal resistance and the manufacturing tolerences as well as the current load
Some are very efficient - better than 97% - while others are horribly inefficient. It pretty much depends on the application and the design requirements. Often times, for low power applications, efficiency isn't as an important factor as cost.
2006-12-10 10:15:26 · answer #1 · answered by LeAnne 7 · 0⤊ 0⤋
Depends which transformers. Power transformers that you see on the posts in US are very efficient usually over 95%. Small transformers in plastic boxes for telephones etc. are around 60% (that's why they heat a lot).
2006-12-10 17:25:56 · answer #2 · answered by fernando_007 6 · 0⤊ 0⤋
There is no measurable loss in a transformer.
2006-12-10 18:53:19 · answer #3 · answered by unpop5 3 · 0⤊ 1⤋