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A step-up transformer operates on a 230 ...

A step-up transformer operates on a 230 V line and supplies a current of 2A. The ratio of primary and secondary winding is `1:25`. The primary current is

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Using the relation `(N_(P))/(N_(S)) = (I_(S))/(I_(P)), I_(P) = (N_(S)I_(S))/(N_(P))`
Here `N_(P)//N_(S) = 1//25` or
`N_(S)//N_(P) = 25//1 = 25` and `I_(S) = 2A`
Current in primary, `I_(P) = 25 xx 2 = 50 A`
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