* Electric field lines: Electric field lines represent the direction and strength of the electric field. They originate from positive charges and terminate on negative charges. The closer the lines are together, the stronger the electric field.
* Inverse square law: The strength of an electric field is inversely proportional to the square of the distance from the charge. This means that if you halve the distance from a charge, the electric field strength will quadruple.
* Force on a test charge: The electric field strength is defined as the force per unit charge. As you get closer to a charge, the force it exerts on a test charge increases, thus increasing the electric field strength.
In mathematical terms:
The electric field strength (E) due to a point charge (Q) at a distance (r) is given by:
E = kQ/r²
Where 'k' is Coulomb's constant. This formula clearly shows that E increases as r decreases.
In conclusion: The electric field strength is directly proportional to the charge and inversely proportional to the square of the distance from the charge. This means that the electric field gets stronger as you move closer to the charge.
