安培计

The resulting current is measured by the ammeter and the resistance is calculated using Ohm's Law.

由安培计测量产生的电流，再使用欧姆定律计算出电阻。

The source resistance of the device under test will affect the noise performance of a feedback ammeter.

被测设备的源电阻会影响反馈式安培计的噪声性能。

As the source resistance is reduced, the noise gain of the ammeter will increase.

源电阻降低，安培计的噪声增益就增加。

The main structure have:Electromagnet and Heng galvanism source, numerical type Gauss account and ammeter and volt account, have control dish of illuminate the system.

主要结构有：电磁铁和恒流电源、数字式高斯计、安培计和伏特计、配有照明系统的控制盘。

The ammeter's voltage burden and input offset current may also affect measurement accuracy.

安培计的输入端压降和输入偏置电流也可能影响测量的准确度。

As an ammeter, the electrometer is capable of measuring extremely low currents, limited only by theoretical limits or by the instrument's input offset current. It also has a much lower voltage burden than conventional DMMs.

做为安培计，静电计能够测量仅由理论极限值或仪器的输入偏置电流所限制的微弱电流，而且其输入端压降比普通的数字多用表要低的多。

To minimize circuit loading, the input resistance of an

为了尽量降低电路负载，安培计的输入电阻应当很小以便降低输入端压降（V2）。

This reduction is caused by the internal resistance, which creates an additional voltage drop called the voltage burden.

这种电流的降低是由安培计的内阻引起的，此内阻产生了一个附加的电压降，称为输入端压降。

The ideal ammeter should read zero when its input terminals are left open.

当输入端开路时，理想安培计的读数应当为零。

Since the voltage drop across the ammeter is negligible, essentially all the test voltage appears across R.

由于安培计上的电压降可以忽略，所以所有的测试电压都出现在电阻R上。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。