Two Identical Pith Balls Supported by Insulating Threads Hang Side

question 10

Multiple Choice

Two identical pith balls supported by insulating threads hang side by side and close together, as shown below. One is positively charged; the other is neutral. We can conclude that

• A)all field lines leaving the positively charged pith ball end on the neutral pith ball.
• B)some of the field lines leaving the positively charged pith ball end on the neutral pith ball.
• C)none of the field lines leaving the positively charged pith ball end on the neutral pith ball.
• D)positive charge is transferred along the field lines until both balls have equal charges.
• E)positive charge is transferred along the field lines until both balls hang along vertical lines.

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Definitions:

Profit-Maximizing Firms

Businesses that operate with the objective to produce the quantity of output that maximizes the difference between total revenue and total cost.

Perfectly Competitive Market

A market structure characterized by a large number of small firms, homogeneity of products, and free entry and exit, leading to optimal distribution of resources.

Market Demand

The combined amount of a product or service that every consumer in a market is prepared and capable of buying at different price points.

Elastic

A characteristic of a good or service whose demand or supply changes significantly when its price changes, indicating sensitivity to price adjustments.