Understanding Electric Charge
How do protons and electrons differ in their electric charge?
equal but oppositely charged
What units are electrical force measured in?
Newtons
Which is stronger, gravitational or electrical forces?
Electrical Forces
What is it called when an object becomes charged by touching another charged object?
Conduction
What is the symbol used for electric field strength?
E
Induction, Conduction, Triboelectric Effect
What is the SI unit for charge?
Coulomb
A large particle has twice the electric charge of a smaller neighboring particle. How does the electrostatic force on each compare?
They are the equal and opposite.
What is it called when a neutral object becomes charged by friction with another neutral object?
Triboelectric effect
Electric field lines point toward which kind of charge?
Negative
In a normal, neutral atom how many electrons are there compared to protons?
same number
A region of space that produces an electric force on any other charged object
Electric field
When calculating electric force, a negative result indicates what?
It is an attractive force
What is it called when the charges in a neutral object are polarized by another object coming near?
Induction
What is true of the direction of the electric field at a point and the direction of an electric force at that point?
They are the same.
What does it mean to say that charge is conserved?
electrons are only passed between atoms, never created or destroyed
What is a conductive body so large that its charge is relatively unaffected when electrons are added or removed?
Electrical Ground
If the space between two charged particles is doubled, what happens to the electrical force between them?
it is quartered
Why is static electricity called static?
it occurs in insulators where electrons do not move freely
What is the difference between Q and q?
Both are electric charges, Q is the charge producing the electric field in question, often larger.
What causes a material to be a good conductor?
atoms have free electrons that move easily
What are the units of electric field strength?
N/C
If two charged objects attract each other with a certain force, how much will that force increase if each of the charges doubles?
It will quadruple.
Define static electricity.
An imbalance of charge within an object
What is the electric field strength of a particle located directly between two equally charged particles?
zero