Chapter 13 Exam

What is another name for materials that are nonconductors?

• insulators
• inverters
• converters
• rectifiers

Rubber, silk, wood, and glass are common examples of:

• modalities
• currents
• insulators
• converters

Rapid and interrupted current that flows in one direction and then in the opposite direction is known as _______ current.

• alternating
• auxiliary
• direct
• sporadic

The unit that measures the pressure or force that pushes the flow of electrons forward through a conductor is a(n):

• amp
• electron
• rectifier
• volt

Normal electric wall sockets that power a hair dryer or curling iron are _______ volts.

• 100
• 120
• 200
• 220

What unit measures the strength of an electric current?

• ampere
• ohm
• volt
• watt

the current for facial and scalp treatments is measured in:

• watts
• kilowatts
• voltages
• milliamperes

What unit measures the resistance of an electric current?

• ampere
• ohm
• watt
• volt

When working with electricity, appliances with a ______ offer the most protection for you and your clients.

• two prong plug with both prongs the same size
• two prong plug with one prong slightly larger
• three prong plug
• grounded universal plug

The use of electrical currents tot treat the skin is commonly referred to as:

• electrotherapy
• electronics
• receptacles
• electromagnetics