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Fortunately, it is possible to define a quantity, called the electric field, which is independent of the test charge. It only depends on the configuration of the source charges, and once found, allows us to calculate the force on any test charge.
- 1: Electrostatic Fields
Originally intended as merely an "explanation" of...
- 1: Electrostatic Fields
An electric field is a region of space in which an electric charge “feels” a force; Electric field strength at a point is defined as: The electrostatic force per unit positive charge acting on a stationary point charge at that point . Electric field strength can be calculated using the equation:
13 sty 2021 · If a charge distribution is continuous rather than discrete, we can generalize the definition of the electric field. We simply divide the charge into infinitesimal pieces and treat each piece as a point charge.
Originally intended as merely an "explanation" of action-at-a-distance, the idea of an electric field turns out to be a much more useful model than one might expect. 1.3: Computing Electric Fields for Known Charge Distributions.
Principle of superposition. Coulomb’s law. The interaction between any two charges is completely unaffected by the presence of other charges. Or we can say that if q1 produces a field of 1 and q2 produces another field , then the field produced by q1 + q2 will be 3 + . Superposition theorem.
The electric field (lines with arrows) of a charge (+) induces surface charges (red and blue areas) on metal objects due to electrostatic induction. Electromagnetic fields are electric and magnetic fields, which may change with time, for instance when charges are in motion.
If a charge distribution is continuous rather than discrete, we can generalize the definition of the electric field. We simply divide the charge into infinitesimal pieces and treat each piece as a point charge.
