Electrostatics

1
Electrostatics
2
Structure of Atom

• Protons and neutrons are found in the nucleus.
• Electrons are found far from the nucleus.

3
Charges of sub-atomic particles

• Protons are positive.
• Electrons are negative.
• Neutrons are neutral.

4
Charge

• Positive (deficit of electrons)
• Negative (extra electrons)
• Neutral (equal numbers of protons and electrons)

5
Attraction and Repulsion

• Unlike charges attract
• Like charges repel

6
Conductors and Insulators

• Conductor-a material that allows charges to flow
  easily
• Insulator-a material that does not allow charges
  to flow easily

7
Charge on an electron or proton

• Proton
• Electron
• SI unit of charge is the coulomb.

8
Coulombs Law
q1charge 1 q2charge 2 ddistance between the
charges
9
Charging by contact

• Result - same charge
• Touch the object you wish to charge with a
  charged object

10
Charge by induction

• Result - opposite charge
• Bring the charged object near
• Ground the object you wish to charge
• Take away ground
• Take away charging object