For a Long Ideal Solenoid Having a Circular Cross-Section,the Magnetic

question 26

Multiple Choice

For a long ideal solenoid having a circular cross-section,the magnetic field strength within the solenoid is given by the equation B(t) = 5.0t T,where t is time in seconds.If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid,find the radius of the solenoid.

• A) 0.30 m
• B) 77 m
• C) 0.94 m
• D) 9.0 m

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Definitions:

Pure Competition

A market structure characterized by a large number of small firms, identical products, and free entry and exit from the market.

Long-run Adjustments

Changes a firm or industry makes over a long period to adapt to changes in demand, technology, or other economic factors.

Allocative Efficiency

Occurs when resources are distributed in a way that maximizes the net benefit to society, with goods and services produced at the level where the last unit provides a benefit equal to its cost of production.

Purely Competitive Industry

An industry characterized by many sellers offering identical products where each seller is a price taker due to market forces.