Electrostatics Flashcards
Define electrostatics
Study of the interactions between stationary, electrically charged particles
Define electrostatics laws
Deal with the attractive and repulsive forces that exist between positive and negative electric charges
When there is more charge (more electrons and protons), there is a _______.
Bigger force.
When there is less charge (less electrons and less protons), there is a _______.
Smaller force.
Define net charge
Amount of excess charge; a neutral object has an equal number of electrons and protons -> no net charge
If there is more protons that electrons, the atom is ______ charged.
Positively
If there is more electrons than protons, the atoms is ______ charged.
Negatively
Why can electrons move around, but protons and electrons cannot (bound in space)?
Electrons are so light that they are not bound in space, however protons and neutrons have mass, which forces them to stay in place.
Name the 3 ways that an object can become charged.
Friction
Contact
Induction
CHARGING BY FRICTION
_______, not protons are, with a little bit of ______, are “scraped” off, and ______.
Electrons
Energy
Transferred
CHARGING BY CONTACT
Process of giving an object a ___ _______ charge by placing it in contact with an object that is ______ _______. Nearly always _____ are exchanged.
Net electric
Already charged
Electrons
CHARGE BY INDUCTION
Possible to change a _______ conductor without _______ (placing object near a _______ object makes the other object _______)
Neutral
Contact
Charged
Charged
Define charge polarisation
When “poles” are created
Who invented the electroscope and when?
Nollet
1748
Define field force
Like gravitational force in that it is a field force. Unlike contact forces, which require physical contact between objects, field forces are capable of acting through space.
