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The primary coil of a transformer has N1 = 320 turns, and the secondary coil has N2 =

2 290 turns. If the input voltage across the primary coil is ?v(t) = 170 cos ?t, where ?v is in volts and t is in seconds, what rms voltage is developed across the secondary coil?
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primary rms voltage=170/sqrt2=120.21 V=E1

secondary voltage =E2

primary turns=N1=320

secondary turns=N2=2290

N2/N1=E2/E1

2290/320=E2/120.2

E2=7.156*120.2=860.25 V= rms voltage of secondary
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