Van de Graaff
What is the material of a Van de Graaff belt?
Rubber
Static electricity is a...
CHARGE
A charged object touches a neutral object and a transfer of electrons occurs. This is called?
Charging by Conduction
How many amps of electrostatic discharge can result from lightning?
10-120 MV and 150kA
Static electricity is most commonly considered a ....
Nuisance
The transfer of charge from the belt to the sphere is which type of charging?
NOT
A charged object is used to charge a neutral object by bringing the objects near but not touching. This is called?
Charging by induction
Name two lightning protection systems.
Lightning rods, lightning arrestors
Dry air acts as a?
Insulator!
What could the Van de Graaff generator be used for?
Generate high voltages
Static electricity is the result of an imbalance of?
Electrical charge within or on the surface of an object.
By which charging method can objects be charged permanently?
Induction
What do lightning arrestors protect?
Electrical equipment and components
Name two industries that use a electrostatic precipitator.
Smelting and ship industry
What is the purpose the metal sphere at the top of the Van de Graaff?
To contain the electric charge
During electrostatic discharge electrons...
jump or discharge across the air gap
The charge that accumulates on an object is determined by the _______ used to produce the charge.
Materials
How many times a year does lightning occur?
1.4 billion times
Which process is used by most photocopiers?
Xerography
What safety precaution is important when operating a Van de Graaff generator?
Operating the generator off the ground as the built-up charge won't have a direct path to ground, reducing risk of accidental discharge.
This imbalance of electrical charges, is a result from two objects coming into contact or rubbing against each other (friction) and then separating.
Triboelectric effect.
By which charging method will both objects have the same charge?
Conduction
They provide a low resistance/impedance path to ground.
What do dryer sheets do to reduce nuisance static electricity in the home?
They coat the clothes with a conductive surface to prevent static charges from building up and allowing the charges to spread through the conductor.