An ideal transformer has 1000 turns on the primary and 100 turns on the secondary, with 220 V on the primary. What is the secondary voltage?
Answer and explanation
Correct answer: D. 22 V
- Step 1: For an ideal transformer Vs / Vp = Ns / Np.
- Step 2: Vs = 220 x 100 / 1000 = 22 V.
Answer
22 V.
Why not the others: '2200 V' inverts the turns ratio; '242 V' adds the turns in the numerator; '22000 V' forgets to divide by the primary turns.
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