Schematic


We are made of electrically conducting material (like a solution of salt in water) The skin of our body offers some electrical resistance. With a low voltage signal we can safely demonstrate this.

Instructions


If you hold the wires tight, the waveform will be displayed just like when a piece of wire is used. Does that mean your body is as good as a wire in conducting electricity. No, think about the current that is flowing. The input impedance of A1 is 1MOhm, means the current flowing is only around 3 micro ampere for the 3 volt signal. A modified form of this setup will allow us to measure the resistance offered by our body.

Again, it depends on whether you are using AC or DC. Body conducts AC better, because the skin that was acting as pure resistor in the case of DC, will act as a dielectric of a capacitor in the case of AC. AC is more fatal for us