用万用表100V档测量电压,指针指示值为400V,该万用表满刻度值为500V,则被测电压实际值应为( )V

用万用表100V档测量电压,指针指示值为400V,该万用表满刻度值为500V,则被测电压实际值应为( )V

A.500

B.400

C.100

正确答案是D