AL electrochemical cell report
2009-05-14 8:05 am
the voltage between the two electrodes should be measured in such a way that no current flows between the two electrodes. in practice, it is possible to make accurate measurements with a potentiometer or digital multimeter. WHY cannot accurate measurements be made while a current flows between the electrodes?
回答 (1)
2009-05-14 5:23 pm
✔ 最佳答案
It can be explained by Ohm's law:By the equation V = IR, we can deduce that as long as there's current flow between the electrodes, there will be voltage across the connecting wires which in turn mean that the voltage measured is not equal to the voltage between the two electrodes since wires, no matter how good they are, will still have some resistance in them.
參考: Myself
收錄日期: 2021-04-23 20:22:48
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https://hk.answers.yahoo.com/question/index?qid=20090514000051KK00008