More Fields Electric Fields at a Location vs. Electric Fields around a Point Charge.
Electric fields
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Transcript of Electric fields
Electric Fields
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.
Fields and forces
• Mass creates a gravitational field that exerts forces on other masses.
Fields and forces
• Gravitational forces are far weaker than electric forces.
Determining the Electric Field
• E = F/q
• E = Electric Field Strength (N/C)q = amount of chargeF = force on charge
Drawing the electric field
Drawing the electric field
• E = F/q
• E = Electric Field Strength (N/C)q = amount of chargeF = force on charge
•
• The direction of an electric field is drawn to show how the field acts on positive charge (Decided by convention)
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.
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.
Electric Fields and Sharks