Summary Edexcel A Level Physics Student Book 2 - Unit 7 - Electric Magnetic Fields

Electric and

Magnetic
Fields

, ① Definitions

An electric field changed particle
is area
whereby
·

an a experiences a



force
·
.


positive
·

Electric field strength is the force per unit
charge experienced by said
particle.
-


F = Force

:.
E : Q : charge


i = force
charge
=
Q, =



Coulombs'law: FBF Qu =
charge 2
r = distach

② Electric Potential

·
Electric potential (v) at a
point is the potential energy per unit change
that in the field.
of a
positive point change at
point

~ the magnitude of electric potential is
greatest at the surface of the change
and as distance from the charge increases the
, potential decreases ,
so


electric potential at
infinity is 200 ·




-
V/v



Y




~ /m




: V =
Electric difference (AU) is the to between
potantial
energy required wit charge
·

more a


two .
points