A step-down transformer is energized by a 220V a.c supply and supplied a current of 10A to the secondary winding. Calculate the current which flows through the primary winding if the ratio of the primary winding to secondary winding is 10:3.

Physics Past Question

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Earlier discussion

1 older comment kept for context.

Daniel Jesudarasimi

9 March 2021

Since the ratio is 10:3
That means for every 10A supplied to the secondary there is 3A supplied to the primary
So since the current supplied to the secondary is 10A then the current supplied to the primary is 3A