8.4 Electric Fields of Charge Distributions

Describe the electric field resulting from a given charge distribution.

• Expressions for the electric field of specified charge distributions can be found using integration and the principle of superposition. Relevant equation: → =E 1 4
• Symmetry considerations of certain charge distributions can simplify analysis of the electric field resulting from those charge distributions. TOPIC 8.4 Electric Fields of Charge Distributions BOUNDARY STATEMENT AP Physics C: Electricity & Magnetism only expects students to use calculus to find the electric field resulting from the following charge distributions and locations: an infinitely long, uniformly charged wire or cylinder at a distance from its central axis, a thin ring of charge at a location along the axis of the ring, a semicircular arc or part of a semicircular arc at its center, and a finite wire or line charge at a point collinear with the line charge or at a location along its perpendicular bisector. TOPIC 8.1 Electric Charge and Electric Force