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Electric force (article) | Electrostatics | Khan Academy
Course: Electrical engineering > Unit 5. Lesson 1: Electric force and electric field. Coulomb's law. Electric force. Inverse square law.
Magnitude of electric field created by a charge - Khan Academy
A point charge is concentrated at a single point in space. Learn about the formula used to find the magnitude and direction of the electric field between two point charges, and see two examples of how to calculate the magnitude of an electric field.
Electric field due to dipole on the axis - Khan Academy
In this video, the reason became clearer as we saw that the regardless of whether the point P is closer to +q or -q on the axis, the direction of the Electric Field due to the dipole is towards the left.
Electric field direction - Khan Academy
The direction of an electrical field at a point is the same as the direction of the electrical force acting on a positive test charge at that point. For example, if you place a positive test charge in an electric field and the charge moves to the right, you know the direction of the electric field in that region points to the right.
Intro to torque on a dipole in uniform electric field
When an electric dipole is placed in a uniform field, it experiences a torque. This torque tries to align the dipole in the direction of the field. Let's explore more.
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For open surfaces, we have to arbitrarily choose between two perpendiculars, but for closed surfaces, we choose the outward direction as our standard. This helps us define the flux to be the dot product of electric field and the area.
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Learn about Coulomb's law and electric force in AP Physics 1 on Khan Academy.
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Gauss law of electricity. Gauss law says the electric flux through a closed surface = total enclosed charge divided by electrical permittivity of vacuum. Let's explore where this comes from and why this is useful. Created by Mahesh Shenoy.
Electric potential (article) | Khan Academy
Electric potential energy. Voltage. Electric potential at a point in space.