[单选题]
The primary of a transformer has 100 turns and i *m0*faa9gsic:ws te7 ts secondarun4zr )v kjvb;/ko1n*y has 200 turns. If the in/vn) jouz1k* nvkrb ;4put voltage to the primary is 100 V, we can expect the output voltage of the secondary to be
A. 50 V.
B. 100 V.
C. 200 V.
D. none of the given answers
