What reaction occurs with a current of 15-50 mA?

A current of 15-50 mA primarily causes pain and muscle contraction. At this range, the electrical stimulus is strong enough to elicit a painful sensation, which can trigger reflexive muscle contractions. This is due to the stimulation of sensory nerves and motor pathways that respond to the electrical input, leading to involuntary movements of muscles.

The sensations experienced at this current level are significant because they indicate a direct interaction with the body's nervous system. While other effects, such as tingling, may occur at lower current levels, the 15-50 mA range is specifically associated with more intense sensations and physical responses, including noticeable discomfort and contractions.

In contrast, higher currents lead to more severe physiological effects, such as respiratory failure or cardiac issues, which are not typical outcomes at this range. This understanding of the physiological responses to different current levels is crucial, especially when assessing safety in electrical environments.