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What is the electric potential at 10 A° from a point charge 10`18 C in vacuum |
| Answer» POINT charges, such as electrons, are among the fundamental building blocks of MATTER. Furthermore, spherical charge distributions (like on a metal sphere) create external electric fields exactly like a point charge. The electric potential due to a point charge is, thus, a case we need to consider. Using calculus to find the work needed to move a test charge Q from a large distance away to a distance of r from a point charge Q, and noting the connection between work and potential (W = −qΔV), it can be shown that the electric potential V of a point charge is V=kQr (Point Charge), where K is a constant EQUAL to 9.0 × 109 N · m2/C2. | |