试题详情

交流电路,视在功率S=1000VA,有功功率P=600W,则电路无功功率Q=(____)。

A400var$;$800W$;$800VA$;$800var或-800var

B400var$;$800W$;$800VA$;$800var或-800var

C400var$;$800W$;$800VA$;$800var或-800var

D400var$;$800W$;$800VA$;$800var或-800var