Share Bushong- Chapter 4 Electricity, Magnetism, Electromagnetism
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Electrostatics is the study of __________________ electric charges.
stationary
Three ways that electrification can be created.
Contact, friction and induction
The Earth behaves as a huge reservoir for stray electric charges. What is this called?
electric ground
Unlike charges __________ and like charges _____________.
attract, repel
Electric fields radiate ________ from a positive charge and radiate
______________ a negative charge.
out, towards
Electrostatic force is strong when objects are close, but decrease as objects separate. What relationship does this show?
Inverse square law
Where are electrostatic charges concentrated?
on the sharpest curve
What is the unit of electric potential ? What is its symbol?
volt, V
What is the study of electric charges in motion?
Electrodynamics
A _______________ is anything that electrons flow easily through.
conductor
A semiconductor is any material that can behave as an _________________ AND
a ________________.
insulator, conductor
What are two examples of conductors?
metal and water
What are three examples of insulators?
glass, clay and rubber
An insulator is any material that (does or does not) allow electron flow ?
does NOT
What are two examples of semiconductors?
silicon and germanium
What results in reduced electric current?
Increasing electric resistance
