Good Guoguang.
Guoguang Electric Co., Ltd. is a world-renowned electroacoustic company. Since its establishment, it has been engaged in the design, production and sales of electroacoustic and electronic products. cover electroacoustic accessories and speakers, audio systems, digital power amplifiers, lithium polymer batteries, etc. Guoguang Electric was listed on the Shenzhen Stock Exchange in China on May 23, 2005 (stock code: 002045). In 2018, it achieved an operating profit of more than 4 billion yuan and has more than 6,000 registered employees.
Wuzhou Guoguang or Yashi is better
(1) According to the given data, when the resistance box of the circuit takes the maximum value, the current in the circuit is about 4 mA, which has exceeded the range of the 2 mA ammeter.
It is therefore not feasible
(2) Draw the experimental circuit diagramaccording to the resistance method in volts:
(3) According to Ohm's closed law, we obtain: E=U+< table cellpadding="-1" cellpacing="-1" style="margin -right:1px">
| 1 |
| U |
| 1 |
| R |
| 1 |
| E |
For example ,
| 1 |
| R |
| 1 |
| U | < /tr>
According to mathematical knowledge, the original size of the vertical axis of the image is obtained< table cellpadding="-1" Cellpacing="-1" style="margin-right:1px">
| 1 |
| 0.28 |
The slope of the image k=
| r |
| E< /td> |
So r=kE=9.7Ω
So the answer is: (1) Not feasible Reason: According to the.the resistance box in the circuit is At the maximum value, the current in the circuit has exceeded the ammeter range of 2?mA
(2) The experimental circuit diagram is shown in the figure :
(3) 3.6, 9.7
Both are good.
1. Wuzhou Guoguang: Wuzhou Guoguang Electric Co., Ltd. is a world-renowned electroacoustic company. Its products cover electroacoustic accessories, speakers, audio systems, digital power amplifiers and lithium polymer batteries. has good development prospects.
2. Yashi: Yashi has its own advantages. For specific information, you can consult relevant industry experts.