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# Electric fields

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### Electric fields

1. 1. Electric Fields
2. 2. Fields and forces• The concept of a field is used to describe any quantity that has a value for all points in space.• You can think of the field as the way forces are transmitted between objects.• Charge creates an electric field that creates forces on other charges.
3. 3. Fields and forces• Mass creates a gravitational field that exerts forces on other masses.
4. 4. Fields and forces• Gravitational forces are far weaker than electric forces.
5. 5. Determining the Electric Field• E = F/q• E = Electric Field Strength (N/C) q = amount of charge F = force on charge
6. 6. Drawing the electric field
7. 7. Drawing the electric field• E = F/q• E = Electric Field Strength (N/C) q = amount of charge F = force on charge•• The direction of an electric field is drawn to show how the field acts on positive charge (Decided by convention)
8. 8. Electric fields and electric force• On the Earth’s surface, the gravitational field creates 9.8 N of force on each kilogram of mass.• With gravity, the strength of the field is in newtons per kilogram (N/kg) because the field describes the amount of force per kilogram of mass.
9. 9. Electric fields and electric force• With the electric field, the strength is in newtons per coulomb (N/C).• The electric field describes the amount of force per coulomb of charge.
10. 10. Electric Fields and Sharks