Lesson 3 - Electric Field

Lightning

Can be produced between opposite charges within a cloud, between two or more separate clouds or between the cloud and the ground  

Lightning

Clouds become negatively charged, which induce positive charges on the ground 

Lightning

Initiates the discharge of lightning  

Field Forces

forces that act between objects even if they are not in constant

Electrostatic (Coloumbic) Force

Gravitational Force

Field Forces

Electric Field

Defined as the amount of electric force on a charged body exerted by external charged bodies

Electric Field

Way on how charged communicate to one another

charged particle

produces an electric field around it. Thus, another charged particle reacts to it by experiencing an electric force

charge

produced an electric field in its surroundings, but this electric field cannot exert a net force on the charge that created it

Electric Field

at a point P as the electric force (Fe) acting on a positive test charge (q0) placed at that point per unit charge

vector quantity

Since electric force is a vector quantity, it can already be deduced that electric field is also a____

E= Fe / q0

Formula

Inverse-square Law

still applicable to the electric field equation

directed away

For a positive charge, the field lines should be ____ from the charge

field lines

line around the charge

directed towards

For a negative charge, the field lines will be _____ it

Case 1: Attractive (positive charge and negative charge)

Case 2: Repulsive (positive charges)

Case 3: Repulsive (negative charged)

Drawing Electric Field Lines

Field lines emanate from the positive charge and terminate to the negative charges

Field lines do not intersect at one point. Field lines only meet if the force between the charges is attractive

The density of the lines (number of lines per space), represents the strength of the field

Three Basic Rules in Drawing Electric Field Lines

emanate, terminate

Field lines _____ from the positive charge and _____ to the negative charges

Attractive

Field lines do not intersect at one point. Field lines only meet if the force between the charges is____  

strength

The density of the lines represents the ____of the field  

density of the lines

number of lines per space

Electrostatic (Coloumbic) Force

calculated using the charges

Gravitational Force

calculated using the mass

higher

higher gravitational forces = ___ mass 

Electric Field

Always existing and Only reacts when there is a charge 

Electric Field

Force per unit charge

Test charge

will react to it by experiencing electric force