Barber Practice State Board Practice Exam

What type of current is characterized as an altering and interrupted current that results in a mechanical reaction?

1. Direct Current

2. Alternating Current

3. Faradic Current

4. Galvanic Current

The correct answer is: Faradic Current

The correct choice is characterized by its unique properties that produce specific effects beneficial in various treatments. Faradic current is an alternating and interrupted electrical current that can stimulate muscle contractions mechanically. This type of current is commonly used in electrotherapy, particularly for muscle re-education and improving blood circulation. Faradic current's interrupted nature allows for the stimulation of motor nerves, leading to the contraction of muscles without the need for physical exercise. This is particularly useful in therapeutic settings where muscle activation is necessary, but the client may be unable to engage in strenuous activity. The other types of currents mentioned do not match this description. Direct current flows in one direction and does not cause the mechanical reactions associated with muscle contraction. Alternating current can change direction but is typically not described as mechanical in the same way as faradic current. Galvanic current is a type of direct current that is used mainly for its chemical effects rather than the mechanical action associated with muscle stimulation. This highlights how faradic current stands out in its application for achieving a specific mechanical response in muscles through its distinctive characteristics.