交流电路阻抗Z=3+j4 Ω,电压U=100V,则电路视在功率S=(____)。
A1200VA$;$2000W$;$1600VA$;$2000VA
B1200VA$;$2000W$;$1600VA$;$2000VA
C1200VA$;$2000W$;$1600VA$;$2000VA
D1200VA$;$2000W$;$1600VA$;$2000VA
A1200VA$;$2000W$;$1600VA$;$2000VA
B1200VA$;$2000W$;$1600VA$;$2000VA
C1200VA$;$2000W$;$1600VA$;$2000VA
D1200VA$;$2000W$;$1600VA$;$2000VA