Electrostatics
The study of the build up of electrical charge on objects and the effect they have on one another
What happens when an atom loses electrons?
it becomes positively charged
What happens when an atom gains electrons
it becomes negatively charged
What makes an atom is uncharged or neutral?
the number of protons is equal to the number of electrons (equaling 0 in a sum)
What do like charges do?
Repel
What do unlike charges do?
Attract
Polorisation
The process where electrons are re-arranged on an object so a positive pole and a negative pole form on the object
Phase 1 of polarasitaion
The objects (balls) are nuteral
Phase 2 of polarisiation
the objects polarise and are attracted to the rod
Phase 3 of polarisation
objects touch the rod and electrons move over
Phase 4 of polarisation
The now positive objects repel from one another
What is poloriastion used for?
Spray painting cars or Telecommunications
The Principle of conservation of Electric Charge
AKA the law of conservation of charge
When electrons move from one object to another the total number of electrons and protons stay the same
Formula for calculation the excess number of electrons that are negatively charged
n = Q/qe
__________________________
n = number of electrons
Q = charge on an electron in Coulomb (C)
qe = charge on an electron (1,6 x 10^-19)
Formula for calculating charge when two charged objects separate
New Q = Q1+Q2/ 2
Formula for calculating the number of electrons transferred
Q transferred = Largest orig Q - new Q/qe
Smallest possible charge (aka qe or elementary charge)
1,6 x 10 ^-19
