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Security is still big issue as email server sites are often broken into and secure connections are easily hacked by hackers. Public mistrust for email security is growing all over the world. Also, keeping
The Seebeck effect could explain it if their were different materials used in composition of the resistor under test. Normally, we think of the Seebeck effect exhibiting in thermocouples, thermopiles
Then it must be in the instrumentation or placement of the probe. If it is a very high resistance value it could be caused by repositioning the probes and leads or your hands being in a different position
Well, if the resistor is still connected to the circuit you will find the same effect even without heating the terminal. This is because the parallel circuit components are causing loading of the resistor
It would be an interesting question for market research project. In my opinion the use by ATM customers would not be of interest to them. The penetration of mobile phones, ipads, androids are too high