How does the resistance of the human body change when the skin is damp?

When the skin is damp, the resistance of the human body decreases significantly. This phenomenon occurs because moisture on the skin creates a pathway for electrical current to flow more easily.

Typically, dry skin has a higher resistance, often estimated around 1,000 to 100,000 Ohms, but when the skin is damp, this resistance can drop markedly, often to around 300 Ohms or lower. The presence of water facilitates ion mobility and enhances conductivity, allowing for more efficient current flow.

Thus, in scenarios where electrical safety is a concern, such as working with electrical devices or during wet conditions, it's crucial to be aware of this reduced resistance, as it increases the risk of electric shock. This understanding is vital in fields like safety engineering, electrical safety training, and health sciences.