An Ideal Air-Filled Parallel-Plate Capacitor Has Round Plates and Carries

question 49

Multiple Choice

An ideal air-filled parallel-plate capacitor has round plates and carries a fixed amount of equal but opposite charge on its plates. All the geometric parameters of the capacitor (plate diameter and plate separation) are now DOUBLED. If the original energy stored in the capacitor was U₀, how much energy does it now store?

• A) 4U₀
• B) 2U₀
• C) U₀
• D) U₀/2
• E) U₀/4

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Definitions:

Conversion Costs

Costs incurred during the transformation of raw materials into finished products, comprising of direct labor and manufacturing overhead.

Weighted-Average Method

A cost accounting method that calculates the cost per unit of inventory by considering both the cost of existing inventory and the cost of new inventory acquired, weighted by their respective quantities.

Process Costing System

is used in manufacturing where production is continuous, and costs are assigned to processes or departments, then averaged over units produced.

Work in Process

Inventory that includes goods that are in the process of being manufactured but are not yet complete.