A transformer is used to change a high alternating e.m.f. to a low alternating e.m.f. of the same frequency. State whether the turns ratio of the above transformer is $=1$ or $>1$ or $<1$.
Explanation
Since the transformer is used to change a high alternating e.m.f. to a low alternating e.m.f. of the same frequency, the turns ratio is less than 1, indicating that the transformer is a step-down transformer.
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