Coulomb’s Law & Electric Field - Science Assignment Help

Assignment Task

Electric Field of Point Charge

1. The electric field from any number of point charges can be obtained from a vector sum of the individual fields.
2. A positive number is taken to be an outward field; the field of a negative charge is toward it.
3. The electric field of a point charge can be obtained from Coulomb's law:
4. The electric field is radially outward from the point charge in all directions.
5. The circles represent spherical equipotential surfaces.

Electric Potential Energy

Potential energy can be defined as the capacity for doing work which arises from position or configuration. In the electrical case, a charge will exert a force on any other charge and potential energy arises from any collection of charges. For example, if a positive charge Q is fixed at some point in space, any other positive charge which is brought close to it will experience a repulsive force and will therefore have potential energy. The potential energy of a test charge q in the vicinity of this source charge will be:

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