交流电路阻抗Z=3+j4 Ω,电压U=100V,则电路无功功率Q=(____)。
A1200var$;$1600VA$;$1600var$;$2000var
B1200var$;$1600VA$;$1600var$;$2000var
C1200var$;$1600VA$;$1600var$;$2000var
D1200var$;$1600VA$;$1600var$;$2000var
A1200var$;$1600VA$;$1600var$;$2000var
B1200var$;$1600VA$;$1600var$;$2000var
C1200var$;$1600VA$;$1600var$;$2000var
D1200var$;$1600VA$;$1600var$;$2000var