An Ideal Parallel-Plate Capacitor Having Circular Plates of Diameter $D$ That Are a Distance

question 100

Multiple Choice

An ideal parallel-plate capacitor having circular plates of diameter $D$ that are a distance $d$ apart stores energy $U$ when it is connected across a fixed potential difference. If you want to triple the amount of energy stored in this capacitor by changing only the size of its plates, the diameter should be changed to

• A) \(\frac { D } { 3 }\)
• B) \(3 D\).
• C) \(D \sqrt { 3 }\)
• D) \(\frac { \mathrm { D } } { \sqrt { 3 } }\)
• E) 9D.

---

Definitions:

Incumbent

The current holder of a position or office, typically in a political or organizational context.

Job Descriptions

Detailed summaries of the duties, responsibilities, required qualifications, and reporting relationships of a specific job within an organization.

Competency Matrix

A framework used to define and assess the skills, knowledge, and behaviors required for specific roles or tasks within an organization.

Job Specification

A written statement that explains what a job demands of jobholders and the human skills and factors required.