Question

What are galvanic and faradic currents?

Answer 1

Galvanic current:

A galvanic type current is defined as a lengthy duration, interrupted kind of direct current with pulse durations of $1\mathrm{ms}$ or greater and a frequency of $30\mathrm{Hz}$.

Galvanic waveforms are of the below kinds:

1. Rectangular surging; this waveform is produced whenever the current is quickly switched on and off.
2. Trapezoidal surging; is a waveform with a sluggish rise and gradual fall.
3. Triangular surging; is a waveform that steadily rises, plateaus, and eventually collapses.
4. Saw tooth surging; is a waveform characterized by a steady rise followed by a sharp decrease in impulse.

Faradic current:

Faradic current is defined as a brief and discontinuous kind of direct current with pulse durations ranging from $0.1$ to $1\mathrm{ms}$ and frequencies extending from $50$ to $100\mathrm{Hz}$.

Faradic waveforms are of the below kinds:

1. Trapezoidal surging; is a waveform in which the impulse steadily develops, followed by a slow decline.
2. Triangular surging; is a waveform in which the impulse generates a trapezoidal surging.
3. Sawtooth surging; is a waveform characterized by a steady rise followed by a sharp decrease in impulse.