Physicshard · Past Paper

The input of a transformer is 220V AC and output is 12V. If it's a step-down transformer and has 1100 turns in primary, find secondary turns.

A120 turns
B60 turns
C24 turns
D110 turns

✓ Correct Answer: B60 turns

Ns = Np * (Vs/Vp) = 1100 * (12/220) = 5 * 12 = 60 turns.

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