Identical Point Charges (+20 μC) Are Placed at the Corners

question 28

Multiple Choice

Identical point charges (+20 μC) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45 μC from infinity to the midpoint of one side of the triangle?

• A) 26 J
• B) 16 J
• C) 23 J
• D) 21 J
• E) 12 J

---

Definitions:

Depreciation Expense

The allocation of a tangible asset's cost over its useful life to account for declines in value over time.

Salvage Value

The anticipated recovery value of an asset when it no longer has usable life.

Straight-Line Method

A method of calculating depreciation by evenly allocating the cost of an asset minus its salvage value over its estimated useful life.

Office Furniture

Items and fixtures used in an office setting for the purpose of work, including desks, chairs, and file cabinets.