Two Parallel Plates That Are Initially Uncharged Are Separated By 1.7

question 11

Multiple Choice

Two parallel plates that are initially uncharged are separated by $1.7 \mathrm {~mm}$ , have only air between them, and each have surface areas of $16 \mathrm {~cm} ^ { 2 }$ . How much charge must be transferred from one plate to the other if $1.9 \mathrm {~J}$ of energy are to be stored in the plates? $\left( \varepsilon _ { 0 } = 8.85 \times 10 ^ { - 12 } \mathrm { C } 2 / \mathrm { N } \cdot \mathrm { m } ^ { 2 } \right)$

• A) \(0.60 \mathrm { mC }\)
• B) \(4.0 \mu \mathrm { C }\)
• C) \(8.0 \mu \mathrm { C }\)
• D) \(5.6 \mu \mathrm { C }\)

---

Definitions:

Fixed Costs

Expenses that do not change with the level of goods or services produced by a business, such as rent, salaries, and insurance.

Variable Costs

Expenses that change in proportion to the activity of a business, such as materials and labor costs that vary with production volume.

Operating Income

Earnings from a company's core business operations, excluding expenses and revenues that are unrelated to the primary activities.

Unit Selling Price

The cost for one unit of a product when it is sold.