1*If an object is negatively (–) or positively (+) charged...
– : It has gained electrons
+ : It has lost electrons
2Insulator
A substance through which electric charge cannot flow
3Conductor
A substance through which electric charge can flow
4*Examples of conductors (4)
*Silver, Copper, Aluminium
Water
Human Body, The Ground
5*Examples of insulators (4)
*Glass
Plastic
Rubber
Air
6*1 Coulomb is the amount of charge on how many electrons?
*6.25 × 10¹⁸
1 ÷ (electronic charge, log tables)
7*Where is static electricity on a conductor????
on the outside
it gathers where the conductor is most pointed
8Coulomb's Law
States that the force of attraction or repulsion between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
91 Coulomb
1 Coulomb of charge passes a particular point when 1 A of current flows for 1 second
10*relative permittivity formula
ε= εr × ε0
medium = relative permittivity × vaccuum
11Electric Field (+ what it's caused by)
any region of space where electric forces can be felt
12*What is an electric field is caused by
*An electric field is always caused by other static charges in the vicinity.
13*Line of Force (Electric Field Line)
*a line drawn in an electric field showing the direction of the force on a positive charge placed in the field.
**check asterisk**
14Electric Field Strength
The electric field strength at a point is the force per unit charge at that point
15*Unit of Electric Field Strength
*N / C = V / m