An Ideal Transformer Has 255 Loops in Its Primary Coil

Multiple Choice

An ideal transformer has 255 loops in its primary coil and 125 loops in its secondary coil.If the primary current is 2.5 A_rms and the device connected to the secondary uses 100 W of power,what is the rms secondary voltage?

A) 38.9 V
B) 19.6 V
C) 40.0 V
D) 62.3 V
E) 100 V