RL串联交流电路,总电压U=100V,电感电压UL=80V,则电阻电压UR=(____)V。
A60V$;$180V$;$20V$;$0V
B60V$;$180V$;$20V$;$0V
C60V$;$180V$;$20V$;$0V
D60V$;$180V$;$20V$;$0V
A60V$;$180V$;$20V$;$0V
B60V$;$180V$;$20V$;$0V
C60V$;$180V$;$20V$;$0V
D60V$;$180V$;$20V$;$0V