A point charge q is placed somewhere with a distance a from the center of a solid conducting sphere of radius R, with a>R. The sphere is electrically neutral. The magnitude of the electric field at the sphere center is ______.
A point charge q is placed somewhere with a distance a from the center of a solid conducting sphere of radius R, with a>R. The sphere is electrically neutral. The magnitude of the electric field at the sphere center is ______.
发布时间：2025-12-18 15:16:31
