Two Point Charges of +1

question 26

Multiple Choice

Two point charges of +1.0 μC and -2.0 μC are located 0.50 m apart.What is the minimum amount of work needed to move the charges apart to double the distance between them? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

• A)-36 mJ
• B)+18 mJ
• C)0 mJ
• D)+36 mJ
• E)-18 mJ

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Definitions:

Straight-Line Depreciation

A method of evenly distributing the cost of an asset over its useful life.

Salvage Value

Salvage value is the estimated residual value of an asset at the end of its useful life, indicating what a company expects to recover or sell the asset for.

Depreciation Expense

The calculated apportionment of the price of a tangible asset over the duration it is useful.