An Uncharged Metal Sphere Is Placed on an Insulating Puck

question 23

Multiple Choice

An uncharged metal sphere is placed on an insulating puck on a frictionless table. While being held parallel to the table, a rod with a charge q is brought close to the sphere, but does not touch it. As the rod is brought in, the sphere

• A) remains at rest.
• B) moves toward the rod.
• C) moves away from the rod.
• D) moves perpendicular to the velocity vector of the rod.
• E) moves upward off the puck.

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Definitions:

Oligopolistic Industry

A market structure characterized by a small number of firms dominating the market, leading to strategic interactions in pricing and output.

Economic Efficiency

A situation where the distribution of resources is designed to enhance the production of goods and services maximally.

Demand Conditions

Factors that affect consumer desire for a product or service, including income levels, tastes, and price of substitutes.

Cost Conditions

The various expenses that firms face related to the production and sale of goods or services, including raw materials, labor, and overhead costs.