单项选择题
The total resistance of a parallel circuit is always （）.
A.larger than the greatest branch resistance B.smaller than the lowest branch resistance C.equal to the sum of the individual branch resistances D.one-half the sum of the individual branch resistances
单项选择题 Reduced voltage applied to a motor during the starting period will （）.
单项选择题 Line losses in a distribution circuit are kept to a minimum by （）.
单项选择题 Which of the following components are used to convert alternating current produced in the generator windings to direct current?（）
