论文部分内容阅读
本文以人教版高中物理选修3-1第1章第8节“电容器的电容”的教学为例,略谈数字式多用电表在物理教学中的应用.1测量电容器的电压一般指针式多用电表的电压档内阻在几千欧到几十千欧,而数字式多用电表的电压挡内阻一般是十兆欧甚至更大.我们知道,电压表的内阻越大,在测量电压时电表对电路的影响就越小,测量就越准确.所以,就一般电路中的电压测量来说,数字式多用电表测量的更精确.对于电容器的电压测量,数字式多用
In this paper, the PEP high school physics elective 3-1 Chapter 1 Section 8 “capacitor capacitance ” teaching as an example, a brief talk on the digital multimeter in physics teaching .1 measurement capacitor voltage pointer Voltage meter multi-meter internal resistance in a few thousands of ohms to tens of thousands of Europe, while the digital multimeter voltage blocking resistor is generally ten megaohms or more.We know that the greater the internal resistance of the voltmeter, the voltage measurement The smaller the effect of the meter on the circuit, the more accurate the measurement, so the measurement of the digital multimeter is more accurate with respect to the voltage measurement in the general circuit.For the voltage measurement of the capacitor, the digital multipurpose