DEL Unit 03: Static Electricity

Static electricity refers to electrons that _____ moving.

are not

Electrostatic charges occur on _____.

insulators

A precipitator is a type of _____.

Air Filter

Lightning is the result of static charges built up in clouds that contain a large amount of moisture.

True

Lightning rods provide an easy path to ground for current to flow.

True

A person can prevent a painful shock by holding a coin in one hand and touching the coin to a grounded surface.

True

Most lightning discharges associated with a cloud occur between the cloud and the ground.

False

The static charge sometimes used during spray painting is an example of a(n) _____ static charge.

useful

A simple way to prevent the painful shock of a static discharge on a person is to hold what in one hand and touch it to a grounded surface?

metal object

The semiconductor material used as a coating on copy machine drums is _____.

selenium

An electroscope can be used to determine the polarity of an electrostatic charge.

True

The dry copy machine does not depend on static electricity. True

True

The static charge that occurs during spray painting helps to produce a uniform finish.

True

Copy machines operate on the principle of static electricity.

True

Static electricity is a current.

False

A lightning protection device that is grounded at one end, with the other end close to but not touching the object to be protected, is called a lightning _____.

arrestor