Electric fields

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Electric Fields

Transcript of Electric fields

Page 1: Electric fields

Electric Fields

Page 2: 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.

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Fields and forces

• Mass creates a gravitational field that exerts forces on other masses.

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Fields and forces

• Gravitational forces are far weaker than electric forces.

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Determining the Electric Field

• E = F/q

• E = Electric Field Strength (N/C)q = amount of chargeF = force on charge

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Drawing the electric field

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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)

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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.

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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.

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Electric Fields and Sharks