How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?

How many primary volts must be applied to a transformer with a turns r

1.	How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?
A.	9 V
B.	90 V
C.	900 V
D.	0.9 V
Answer» C. 900 V