The primary winding of an electric train transformer has 400 turns, and the secondary has 50.If the input voltage is 120 V(rms), what is the output voltage?

The primary winding of an electric train transformer has 400 turns, and the secondary has 50.If the input voltage is 120 V(rms), what is the output voltage?
A)480 V
B)60 V
C)15 V
D)10 V

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