If you touch the two terminals of a power supply with your two fingertips on opposite hands, the potential difference will produce a current through your torso. The maximum safe current is approximately 5 mA.

If your hands are completely dry, the resistance of your body from fingertip to fingertip is approximately 530 kΩ. If you accidentally touch both terminals of your 120 V household electricity supply with dry fingers, what current will flow, and will you receive a dangerous shock?