Perceive Electrical Current Graphic Perception is defined as the lowest level at which people can still perceive electrical current. Typically, the level of perception is 1/100 amp, or 1 milliamp. Any lesser amount of current would not be felt by most people. Slightly above this level, a mild tingling sensation is felt and the person "perceives" that electricity is there. Your tongue is usually the most sensitive organ and can easily sense the current flow from a small battery.