Final answer:
High Frequency Current produces a mild stimulating sensation at currents between 1-5 mA. It is used in medical treatments, such as transcranial magnetic stimulation, without causing deep tissue damage.
Step-by-step explanation:
High Frequency Current will produce a mild, stimulating sensation when used appropriately. Very small currents frequently pass through the body without being noticed. However, when the current reaches a threshold of 1 mA, it can become perceptible and may be utilized therapeutically.
Shocks under 5 mA are considered safe and are often employed in various medical treatments and safety standards. Current intensities between 5-30 mA can cause muscular contractions similar to those triggered by regular nerve impulses. High Frequency Current's efficiency at these levels opens its usage for medical treatments, such as burning off warts, without affecting deeper tissues like the heart.
Further illustrating the utility of High Frequency Current, it does not cause harm at very high frequencies because the current travels only on the skin's surface. This property is harnessed for certain procedures, including transcranial magnetic stimulation (TMS), where weak induced currents help in recovering brain tissue's electrical functioning, thus assisting with various neurological conditions.