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March 28, 2015

Homework Help: Physics (just checking it)

Posted by BAdams on Wednesday, June 4, 2008 at 2:36pm.

q:The electricity revised at an electric substation has a potential difference of 2.80 10^5V, if the required output is 440 V. what should be the ratio of the turns of the step-down transformer?

a: 28000/440= 636

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