Chapter 5: Basic Principles of Electricity and Electrical Stimulating Currents

Chapter 5: Basic Principles of Electricity and Electrical Stimulating Currents

Electrons tend to flow from areas of low concentration to areas of high concentration.

a. True

b. False

b. False

Insulators resist current flow.

a. True

b. False

a. True

The greater the voltage, the greater the amplitude is.

a. True

b. False

a. True

The cathode is the negatively charged electrode in a DC system.

a. True

b. False

a. True

Chronaxie refers to the minimum current intensity needed for tissue excitation if applied for a maximum time.

a. True

b. False

b. False

The electrode with the greatest current density is the active electrode.

a. True

b. False

a. True

A particle of matter with very little mass and a negative charge is a(n)

a. ion

b. electron

c. neutron

d. proton

b. electron

What is the name of the unit measuring the force necessary to produce electron movement?

a. ampere

b. coulomb

c. volt

d. watt

c. volt

In ______________ current, electron flow constantly changes direction.

a. alternating

b. direct

c. pulsatile

d. galvanic

a. alternating

When the current increases gradually to a maximal amplitude, it is ...