一、本月知识学习指要分清电量和电流强度是两个不同的物理量，知道电压是使电路中形成电流的原因，而电源又是提供电压的装置，因此要有电流必须有电源，并且电路是闭合的．常用的电流表和电压表一般有两个量程、三个接线柱，并且都标出正负符号．电表的使用中应注意：１... First, this month’s knowledge learning is to distinguish between the amount of electricity and current intensity is two different physical quantities, know that the voltage is the cause of the formation of current in the circuit, and the power supply is the device that provides the voltage, so there must be a current must have a power supply, and the circuit It is closed. Commonly used ammeters and voltmeters generally have two ranges and three terminals, and all have positive and negative signs. The use of electricity meters should pay attention to: 1...