[单选题]
A solenoid 20 cm lon c 9 mb7ch8te81crb(zmgklicclimlgq,*8 /vo6/-u c v0 is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid *l l ,g/6 m-kv/lvic 0qcuc8oiwhen a current of 10 A flows?
A. $0.0063 \; T$
B. $0.20 \; T$
C. $3.2 \; T$
D. $4.8 \; T$
