As Shown in the Figure, Three Charges Are at Corners $Q = - 90 \mathrm { nC }$

question 73

Multiple Choice

As shown in the figure, three charges are at corners of a rectangle. The charge in the bottom right corner is $Q = - 90 \mathrm { nC }$ , and all the other quantities are accurate to two significant figures. What is the magnitude of the net electrical force on $Q$ due to the other two charges? $\left( k = 1 / 4 \pi \varepsilon _ { 0 } = 9.0 \times 10 ^ { 9 } \right.$ $\mathrm { N } \cdot \mathrm { m } ^ { 2 } / \mathrm { C } ^ { 2 }$ )

• A) \(7.1 \times 10 ^ { - 2 } \mathrm {~N}\)
• B) \(5.3 \times 10 ^ { - 2 } \mathrm {~N}\)
• C) \(2.8 \times 10 ^ { - 2 } \mathrm {~N}\)
• D) \(3.8 \times 10 ^ { - 2 } \mathrm {~N}\)

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Definitions:

Infinitely Inelastic

Describes a situation where the quantity demanded or supplied does not change regardless of price changes.

Economic Rents

The excess payment made to a factor of production over and above what is needed to bring that factor into production, often seen as a measure of market inefficiency.

Aggregate

A total sum or amount made up of distinct components, often used in economics to refer to total output or income.

Equilibrium

An equilibrium where demand meets supply in the marketplace, stabilizing prices as a consequence.