Question Detail

Gauss's law is most useful when the charge distribution possesses high symmetry, allowing for the selection of a Gaussian surface where the electric field is either constant and perpendicular to the surface, or parallel (zero flux) to the surface. Let's analyze the options:A. For spherical charge distribution, a concentric sphere is indeed the appropriate Gaussian surface. (True)B. For an infinite uniform plane, a single plane cannot be a closed Gaussian surface that encloses a volume. The Gaussian surface should enclose a volume. (False)C. For an infinite uniform plane charge distribution, a "coin-shaped" flat cylinder (often called a 'pillbox') is the appropriate Gaussian surface. Its flat ends are parallel to the plane, and its curved surface is perpendicular. (True)D. For an infinitely long cylinder or wire, a coaxial cylinder is the appropriate Gaussian surface. (True)Since the question asks for 'TRUE' and options A, C, and D are all correct statements about the application of Gauss's law for different symmetries, the question is somewhat ambiguous. However, option C provides a very specific and correct description of the Gaussian surface for an infinite plane, which is a common application. In cases of multiple correct options, the most detailed or representative one is often preferred.