Final answer:
An ultrasonic skin scrubber is an electrical appliance that produces a high rate of oscillation within glass electrodes for facial and scalp treatments.
Step-by-step explanation:
The electrical appliance that produces a high rate of oscillation within glass electrodes for facial and scalp treatments is called an ultrasonic skin scrubber.
This device uses high-frequency sound waves, typically around 23 kHz, to create vibrations in the glass electrodes.
These vibrations help to exfoliate the skin, remove impurities, and improve blood circulation.