When a Parallel-Plate Capacitor of Capacitance C Is Connected to a Battery

question 11

Multiple Choice

When a parallel-plate capacitor of capacitance C is connected to a battery of voltage V, the energy density in the capacitor is u. If the voltage of battery is doubled, which of the following changes would keep the energy density equal to its previous value u?

• A)doubling the spacing of the plates
• B)doubling the size of the plates
• C)reducing the size of the plates by half
• D)reducing the spacing of the plates
• E)The energy density is unaffected by a change in the voltage.

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Definitions:

Conversion Cost

The direct costs of converting raw materials into finished products, including labor and manufacturing overhead.

Total Materials Costs

The combined cost of direct materials and any indirect materials used in the manufacturing process.

Equivalent Units

A term used in cost accounting to express the amount of work completed in terms of fully finished units.

Beginning Work in Process

The value of goods that are in the process of being manufactured at the start of an accounting period, included in the calculation of cost of goods manufactured.