D.2 - Electric Fields Flashcards
What are the two properties of charge?
Charge is quantised and charge is conserved
What is the formula for charge?
q=Ne
The electric force acts _ charges.
between
Negative charges are an _ of electrons than protons while positive charges are a _ of electrons as compared to protons.
excess, defficiency
What are the three ways to transfer charge?
Friction, induction, contac
What is Coulombs law?
F=kQq/r^2
What is the formula for Coulombs constant?
k=1/4πε0
What is ε0?
The permittivity of free space. The ease at which an electric field can pass through a substance.
What is the relative permittivity formula?
εr = ε/ε0
What is electric field strength?
Force per unit charge that is experienced by a small positive test charge.
What is the formula for electric field strength?
E=F/q which is kQ/r^2
What is a uniform field?
An electric field with constant field strength at all points.
What is the formula for electric field strength between plates?
E=V/d
Which direction do magnetic field lines go in?
North to South
With a _ _ in a wire a _ _ is created around it.
current,flowing,magnetic,field
