A Solid Insulating Sphere of Radius R Contains a Positive

question 24

Multiple Choice

A solid insulating sphere of radius R contains a positive charge that is distrubuted with a volume charge density that does not depend on angle but does increase with distance from the sphere center. Which of the graphs below correctly gives the magnitude E of the electric field as a function of the distance r from the center of the sphere?

• A) A
• B) B
• C) C
• D) D
• E) E

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Definitions:

Marginal Cost

The cost of producing one additional unit of a good or service, which is used in determining the optimal production level.

Streetlight

A light, typically mounted on a pole, providing illumination for a street or public area to enhance safety and visibility at night.

Willing

Generally refers to being prepared or inclined to do something, indicating a readiness or acceptance.

Public Good

Public goods are goods that provide benefits to all members of a society, without the ability to exclude individuals from enjoying the benefits, such as clean air or national defense.