In the Arrangement Shown, a Conducting Bar of Negligible Resistance

question 11

Multiple Choice

In the arrangement shown, a conducting bar of negligible resistance slides along horizontal, parallel, frictionless conducting rails connected as shown to a 2.0-Ω resistor. A uniform 1.5-T magnetic field is perpendicular to the plane of the paper. If L = 60 cm, at what rate is thermal energy being generated in the resistor at the instant the speed of the bar is equal to 4.2 m/s?

• A) 8.6 W
• B) 7.8 W
• C) 7.1 W
• D) 9.3 W
• E) 1.8 W

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Definitions:

Perfect Competition

A market structure where numerous small firms compete against each other, selling identical products, leading to optimal pricing and output levels.

Standardized Product

A product that is uniform in quality and produced in large quantities by many different firms.

Market Share

The portion of a market controlled by a particular company or product, often expressed as a percentage of total sales in the industry.

Perfect Competition

An idealized market structure where all participants are price takers due to the presence of many participants, homogeneous products, and no barriers to entry.