ELECTROSTATICS
Equipotential
Electric Force And Coulomb's Law
Electric Field , E
Electric Potential Energy , V
Electric Charges , Q
Positive charge, p = +1.6 x 10^-19 C
Negative charge , e = -1.6 x 10^-19 C
Charge cannot be created nor destroyed, it can only be transferred from one material to another
.
Quantization of charge : Q = ne
Coulomb's Law states that the electric force , F between two charges seperated by a distance , r is
i) inversely proportional to the square of the separation , r between two charges
ii) and directly proportional to the product of the magnitudes of the charges , Q1 and Q2.
A region in which and electric force will act on a charge when the charge is placed in the region.
Definition : The electric force acting per unit charge.
Unit : NC^-1
E = F/q
E = kQ/r^2
- Number of lines per unit area determine the strength of electric field.
- Do not intersect each other
- Represented by electric field lines
E is large when the field lines are close together
Charge in a uniform electric field
F = qE
F = ma
Definiton : Work done per unit charge , V=W/q
Unit : J C^-1 or Volt (V)
A surface on which all points are at the same potential.
The potential difference between any two points on an equipotential surface is zero.
Alyaa Nadirah , T19