题目内容
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提问人:网友zthu139
发布时间:2022-01-07
[主观题]
the following circuit is a differential voltage to current convertor. if it is needed to convert a voltage has range of 1 - 5v to a current range from 4 ~ 20 ma, the value of r =
The following circuit is a differential voltage to current convertor. If it is needed to convert a voltage has range of 1 - 5V to a current range from 4 ~ 20 mA, the value of R =?
A、500
B、250
C、125
D、400
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