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• PHY102 Physics II © Dr.Cem Özdoğan

• 21 Summary

• Electric Charge
• The strength of a particle’s electrical interaction with objects around it depends on its electric charge, which can be either positive or negative.

• Conductors and Insulators
• Conductors are materials in which a significant number of electrons are free to move. The charged particles in nonconductors (insulators) are not free to move.

• Coulomb’s Law
• The magnitude of the electrical force between two charged particles is proportional to the product of their charges and inversely proportional to the square of their separation distance.
• .

• Eq. 21-4

• The Elementary Charge
• Electric charge is quantized (restricted to certain values).
• e is the elementary charge

• Eq. 21-12

• Conservation of Charge
• The net electric charge of any isolated system is always conserved.

• September 23, 2021