单项选择题
For practical purposes, in a simple series circuit, the source voltage will be dropped across one resistor if it has（）.
A.half the resistance of the other resistor B.a resistance equal to the other C.at least ten times the resistance of the other D.a partial short circuit
单项选择题 Which is a function of the voltage regulators used with AC generators?（）
单项选择题 The most inefficient method of voltage reduction from the stand point of power loss, is a/an （）
单项选择题 In a simple series circuit, the entire source voltage will drop across （）
