[单选题]
The primary of a transformer has 100 turns and its secondary has 200 tur+sy,1s9 p2*1spnjz y g lmiri1ns. 5 r0uy(,wj; fhvz8ott If the power input to the primary is 100 W, we can expect the power output of the secondary to be (neglecting frictitv508ou,y; hjtw zf( ronal losses)
A. 50 W.
B. 100 W.
C. 200 W.
D. none of the given answers
