试题详情

交流电路,电压u=100√2sin(ωt-30°)V,电流i=10√2sin(ωt-90°)A,则电路无功功率Q=(____)。

A500var$;$1000var$;$866var$;$-866var

B500var$;$1000var$;$866var$;$-866var

C500var$;$1000var$;$866var$;$-866var

D500var$;$1000var$;$866var$;$-866var