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