A Non-Conducting Sphere of Radius R = 7

question 34

Multiple Choice

A non-conducting sphere of radius R = 7.0 cm carries a charge Q = 4.0 mC distributed uniformly throughout its volume.At what distance,measured from the center of the sphere,does the electric field reach a value equal to half its maximum value?

• A) 3.5 cm only
• B) 4.9 cm only
• C) 3.5 cm and 9.9 cm
• D) 3.5 cm and 4.9 cm
• E) 9.9 cm only

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Definitions:

Faults and Fractures

Breaks in the Earth's crust where blocks of the crust have moved relative to each other due to tectonic forces.

Ore

A rock, sediment, or other material that can be mined for a profit.

Mineral Deposit

Concentrated accumulations of minerals from which economically valuable materials can be extracted.

Oxide

1. Any member of a group of minerals that consist of oxygen bonded with a metallic element, like iron. 2. Mineralized rock that contains minerals, especially those of iron and copper, that formed near the surface or in other oxidizing conditions.