A stress meter is an electronic device that measures the stress of the body depending upon the current flow through the body. The level of human body resistance varies with the stress of our mind and body. The blood flow increases in the stressed body which allows more current to flow across our body.

On the other hand, there is less blood flow in a stress-free and has very resistance, thus resulting in fewer ion concentrations in the. Stress meters generally use ohm’s law in determining the stress by glowing different LEDs.

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