---
title: "A positive point charge \\(+Q\\) is fixed at the center of an isolated, uncharged conducting spherical shell with inner radius \\(a\\) and outer radius \\(b\\). The electric potential is defined to be zero at infinity (\\(V(\\infty) = 0\\)). Which of the following graphs best represents the electric potential \\(V\\) as a function of radial distance \\(r\\) from the center?"
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url: "https://nerd-notes.com/ubq/121190/"
date_modified: "2026-08-23T04:58:37+00:00"
---

# A positive point charge \(+Q\) is fixed at the center of an isolated, uncharged conducting spherical shell with inner radius \(a\) and outer radius \(b\). The electric potential is defined to be zero at infinity (\(V(\infty) = 0\)). Which of the following graphs best represents the electric potential \(V\) as a function of radial distance \(r\) from the center?

A positive point charge \(+Q\) is fixed at the center of an isolated, uncharged conducting spherical shell with inner radius \(a\) and outer radius \(b\). The electric potential is defined to be zero at infinity (\(V(\infty) = 0\)). Which of the following graphs best represents the electric potential \(V\) as a function of radial distance \(r\) from the center?

![A 2D cross-sectional diagram showing a thick circular conducting shell centered at the origin. At the center is a small black dot labeled +Q. An inner circular boundary of radius a is drawn as a solid circle, and an outer concentric circular boundary of radius b is drawn as a larger solid circle. The region between radius a and radius b has a light gray fill to indicate the conducting shell. Two dashed dimension arrows extend from the center: one arrow pointing upward and to the left to the inner boundary labeled a, and a second arrow pointing upward and to the right to the outer boundary labeled b. No other labels, lines, text, or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1787461115-m7KBeD.jpg)

- **A.** Graph A
- **B.** Graph B
- **C.** Graph C
- **D.** Graph D

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/121190/*