6A.3 Coulomb's Law

Question 1

what is coulomb’s law

Answer 1

f=kQ1Q2/r^2 which comes from EQ=Q1Q2/r^2

Question 2

an attraction between a proton and an electron can be imagined by

Answer 2

a proton creating an electric field of positive charge with the electron experiencing a force due to the protons field (note: it can be opposite)

Question 3

what is an explanation of everyday levitation

Answer 3

so an atom has a negative charge electron orbiting so we can say that the top of any surface consists of a negative sheet, so if the bottom of a man’s foot is made of a negative sheet of electrons and the top of the floor is made of a negative sheet of electrons repulsion will occur so technically the man is levitating

Question 4

calculations of man levitations

Answer 4

page 36

Question 5

what are the two ways to prove coulombs law experimentally

Answer 5

1. by charging two insulated metal spheres using a van de graff generator, or induction by a charged plastic road, then putting the two spheres a distance away from each other creating a force that can be measured using an electronic balance, then measure the force and different distances proving that coulombs law is the inverse of the square law
2. page 37 IMP