A step-down transformer has 1200 primary turns and 60 secondary turns. If an alternating voltage of 240 V is supplied to the primary winding, what is the output secondary voltage?
Answer and explanation
Correct answer: A. 12 V
- Step 1: Use the ideal transformer turn ratio equation: .
- Step 2: Compute: .
Answer
12 V.
Why not the others: 24 V uses turn ratio 1/10; 6.0 V uses 1/40; 48 V inverts the primary voltage.
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