Static Electricity

True of False- Thunderclouds can contain both positive and negative charges

True

Static electricity refers to electrons that

are not moving

Within a lightning bold, current flows

from negative to positive

Current always flows from

negative to positive

If a thundercloud has a positive charge, the current in the lightning bold will flow from

the Ground to the cloud

An electroscope is a instrument used for:

to determine polarity of the electric charge

The precipitator uses a high-voltage DC power supply to provide a set of wires with a positive charge and a _______ with a negative charge

set of plates

A precipitator is a type of

Air Filter

Insulators are the only materials that can hold ____ stationary.

Electrons

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

Electrostatic charges occur on

Insulators

Static electricity is considered a charge and not a current because

It is sitting still, not moving

The two devices used for lightning protection are

Lightning rod and lightning assestor

In a clothes dryer, the greatest static charges generally are built up on

Man-made fabrics

Bringing a charged test object near the ball of a charged electroscope caused the leaves to move closer together. This indicates that the test object charge is the ______ polarity as the electroscope charge.

Opposite

What is used to coat the aluminum drum of a copy machine

Selenium

What is used to "dope" semiconductors?

Selinium and Germanium

Selenium is a

Semiconductor

Copy machines operate on the principle of

Static electricity

Electrostatic charges are built up on insulator materials because:

insulators are the only material that can hold the electrons stationary and keep them from flowing to a different location

True or False -Most lightning discharges associated with a cloud occurs between the cloud and the ground.

False

This will, if struck by lightning, bleed the lightning discharge to ground before the protected item can be harmed

Lightning Rod

If electrons are removed from an object

The object is now positively charged