The Plates of a Parallel Plate Capacitor Each Have an Area

question 53

Multiple Choice

The plates of a parallel plate capacitor each have an area of 0.40 m² and are separated by a distance of 0.02 m. They are charged until the potential difference between the plates is 3000 V. The charged capacitor is then isolated.
-How much work is required to move a -4.0 $\mu$ C charge from the negative plate to the positive plate of this system?

• A)-1.2 × 10^-2 J
• B)+1.2 × 10^-2 J
• C)-2.4 × 10^-2 J
• D)+2.4 × 10^-2 J
• E)-5.4 × 10^-2 J

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Definitions:

Periodic System

A method of inventory valuation for financial statements where purchases during the period are recorded directly to an inventory account and the cost of goods sold is determined at the end of the accounting period.

Purchase Discounts

A reduction in the purchase price, allowed by the seller to encourage early payment by the buyer.

Accounts Payable

An account representing the amounts a company owes to suppliers or creditors for goods or services received but not yet paid for, typically a current liability on the balance sheet.

Perpetual Inventory System

An inventory system that updates the quantity and cost of inventory immediately following purchase or sale activities.