$\mathrm { A } + 5.0 - \mu \mathrm { C }$

question 72

Multiple Choice

$\mathrm { A } + 5.0 - \mu \mathrm { C }$ point charge is $12 \mathrm {~cm}$ from a $- 5.0 - \mu \mathrm { C }$ point charge. What is the magnitude of the electric field they produce at the point on the line connecting them where their electric potential (relative to infinity) is zero? $\left( k = 1 / 4 \pi \varepsilon _ { 0 } = 9.0 \times 10 ^ { 9 } \mathrm {~N} \cdot \mathrm { m } ^ { 2 } / \mathrm { C } ^ { 2 } \right)$

• A) \(12.5 \mathrm { MN } / \mathrm { C }\)
• B) \(0 \mathrm {~N} / \mathrm { C }\)
• C) \(0.75 \mathrm { MN } / \mathrm { C }\)
• D) \(25 \mathrm { MN } / \mathrm { C }\)
• E) \(1.5 \mathrm { MN } / \mathrm { C }\)

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Definitions:

Subsistence Agriculture

Subsistence Agriculture is a type of farming in which the farmers focus on growing enough food to feed themselves and their families, with little to no surplus for trade.

Agricultural Diversification

The practice of growing a variety of crops or engaging in different agricultural activities to reduce risk and increase sustainability in farming.

Crop-Lien System

A credit system widely used in the Southern United States after the Civil War, where farmers used their crops as collateral for loans, leading to cycles of debt and poverty.

Southern Farmers

Generally refers to agricultural workers and landowners in the Southern United States, historically dependent on crops like cotton and tobacco, and deeply affected by the Civil War and subsequent economic changes.